macos: Fix shared memory compatibility and add documentation
Implement workaround for macOS POSIX shm 31-character name limit by hashing long keys. Add comprehensive documentation for macOS-specific compatibility fixes. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>macos_fixed_with_readme
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# macOS Documentation
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This directory contains macOS-specific documentation for the piker project.
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## Contents
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- **[compatibility-fixes.md](compatibility-fixes.md)** - Comprehensive guide to macOS compatibility issues and their solutions
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## Quick Start
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If you're experiencing issues running piker on macOS, check the compatibility fixes guide:
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```bash
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cat docs/macos/compatibility-fixes.md
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```
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## Key Issues Addressed
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1. **Socket Credential Passing** - macOS uses different socket options than Linux
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2. **Shared Memory Name Limits** - macOS limits shm names to 31 characters
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3. **Cleanup Race Conditions** - Handling concurrent shared memory cleanup
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4. **Async Runtime Coordination** - Proper trio/asyncio shutdown on macOS
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## Platform Information
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- **Tested on**: macOS 15.0+ (Darwin 25.0.0)
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- **Python**: 3.13+
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- **Architecture**: ARM64 (Apple Silicon) and x86_64 (Intel)
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## Related Projects
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These fixes may also apply to:
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- [tractor](https://github.com/goodboy/tractor) - The actor runtime used by piker
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- Other projects using tractor on macOS
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## Contributing
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Found additional macOS issues? Please:
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1. Document the error and its cause
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2. Provide a solution with code examples
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3. Test on multiple macOS versions
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4. Submit a PR updating this documentation
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# macOS Compatibility Fixes for Piker/Tractor
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This guide documents macOS-specific issues encountered when running `piker` on macOS and their solutions. These fixes address platform differences between Linux and macOS in areas like socket credentials, shared memory naming, and async runtime coordination.
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## Table of Contents
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1. [Socket Credential Passing](#1-socket-credential-passing)
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2. [Shared Memory Name Length Limits](#2-shared-memory-name-length-limits)
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3. [Shared Memory Cleanup Race Conditions](#3-shared-memory-cleanup-race-conditions)
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4. [Async Runtime (Trio/AsyncIO) Coordination](#4-async-runtime-trioasyncio-coordination)
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---
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## 1. Socket Credential Passing
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### Problem
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On Linux, `tractor` uses `SO_PASSCRED` and `SO_PEERCRED` socket options for Unix domain socket credential passing. macOS doesn't support these constants, causing `AttributeError` when importing.
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```python
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# Linux code that fails on macOS
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from socket import SO_PASSCRED, SO_PEERCRED # AttributeError on macOS
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```
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### Error Message
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```
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AttributeError: module 'socket' has no attribute 'SO_PASSCRED'
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```
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### Root Cause
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- **Linux**: Uses `SO_PASSCRED` (to enable credential passing) and `SO_PEERCRED` (to retrieve peer credentials)
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- **macOS**: Uses `LOCAL_PEERCRED` (value `0x0001`) instead, and doesn't require enabling credential passing
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### Solution
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Make the socket credential imports platform-conditional:
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**File**: `tractor/ipc/_uds.py` (or equivalent in `piker` if duplicated)
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```python
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import sys
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from socket import (
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socket,
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AF_UNIX,
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SOCK_STREAM,
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)
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# Platform-specific credential passing constants
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if sys.platform == 'linux':
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from socket import SO_PASSCRED, SO_PEERCRED
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elif sys.platform == 'darwin': # macOS
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# macOS uses LOCAL_PEERCRED instead of SO_PEERCRED
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# and doesn't need SO_PASSCRED
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LOCAL_PEERCRED = 0x0001
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SO_PEERCRED = LOCAL_PEERCRED # Alias for compatibility
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SO_PASSCRED = None # Not needed on macOS
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else:
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# Other platforms - may need additional handling
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SO_PASSCRED = None
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SO_PEERCRED = None
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# When creating a socket
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if SO_PASSCRED is not None:
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sock.setsockopt(SOL_SOCKET, SO_PASSCRED, 1)
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# When getting peer credentials
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if SO_PEERCRED is not None:
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creds = sock.getsockopt(SOL_SOCKET, SO_PEERCRED, struct.calcsize('3i'))
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```
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### Implementation Notes
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- The `LOCAL_PEERCRED` value `0x0001` is specific to macOS (from `<sys/un.h>`)
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- macOS doesn't require explicitly enabling credential passing like Linux does
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- Consider using `ctypes` or `cffi` for a more robust solution if available
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---
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## 2. Shared Memory Name Length Limits
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### Problem
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macOS limits POSIX shared memory names to **31 characters** (defined as `PSHMNAMLEN` in `<sys/posix_shm_internal.h>`). Piker generates long descriptive names that exceed this limit, causing `OSError`.
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```python
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# Long name that works on Linux but fails on macOS
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shm_name = "piker_quoter_tsla.nasdaq.ib_hist_1m" # 39 chars - too long!
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```
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### Error Message
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```
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OSError: [Errno 63] File name too long: '/piker_quoter_tsla.nasdaq.ib_hist_1m'
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```
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### Root Cause
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- **Linux**: Supports shared memory names up to 255 characters
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- **macOS**: Limits to 31 characters (including leading `/`)
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### Solution
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Implement automatic name shortening for macOS while preserving the original key for lookups:
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**File**: `piker/data/_sharedmem.py`
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```python
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import hashlib
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import sys
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def _shorten_key_for_macos(key: str) -> str:
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'''
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macOS has a 31 character limit for POSIX shared memory names.
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Hash long keys to fit within this limit while maintaining uniqueness.
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'''
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# macOS shm_open() has a 31 char limit (PSHMNAMLEN)
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# Use format: /p_<hash16> where hash is first 16 hex chars of sha256
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# This gives us: / + p_ + 16 hex chars = 19 chars, well under limit
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# We keep the 'p' prefix to indicate it's from piker
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if len(key) <= 31:
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return key
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# Create a hash of the full key
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key_hash = hashlib.sha256(key.encode()).hexdigest()[:16]
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short_key = f'p_{key_hash}'
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return short_key
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class _Token(Struct, frozen=True):
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'''
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Internal representation of a shared memory "token"
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which can be used to key a system wide post shm entry.
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'''
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shm_name: str # actual OS-level name (may be shortened on macOS)
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shm_first_index_name: str
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shm_last_index_name: str
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dtype_descr: tuple
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size: int # in struct-array index / row terms
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key: str | None = None # original descriptive key (for lookup)
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def __eq__(self, other) -> bool:
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'''
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Compare tokens based on shm names and dtype, ignoring the key field.
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The key field is only used for lookups, not for token identity.
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'''
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if not isinstance(other, _Token):
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return False
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return (
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self.shm_name == other.shm_name
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and self.shm_first_index_name == other.shm_first_index_name
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and self.shm_last_index_name == other.shm_last_index_name
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and self.dtype_descr == other.dtype_descr
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and self.size == other.size
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)
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def __hash__(self) -> int:
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'''Hash based on the same fields used in __eq__'''
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return hash((
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self.shm_name,
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self.shm_first_index_name,
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self.shm_last_index_name,
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self.dtype_descr,
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self.size,
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))
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def _make_token(
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key: str,
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size: int,
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dtype: np.dtype | None = None,
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) -> _Token:
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'''
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Create a serializable token that uniquely identifies a shared memory segment.
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'''
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if dtype is None:
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dtype = def_iohlcv_fields
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# On macOS, shorten long keys to fit the 31-char limit
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if sys.platform == 'darwin':
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shm_name = _shorten_key_for_macos(key)
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shm_first = _shorten_key_for_macos(key + "_first")
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shm_last = _shorten_key_for_macos(key + "_last")
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else:
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shm_name = key
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shm_first = key + "_first"
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shm_last = key + "_last"
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return _Token(
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shm_name=shm_name,
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shm_first_index_name=shm_first,
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shm_last_index_name=shm_last,
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dtype_descr=tuple(np.dtype(dtype).descr),
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size=size,
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key=key, # Store original key for lookup
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)
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```
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### Key Design Decisions
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1. **Hash-based shortening**: Uses SHA256 to ensure uniqueness and avoid collisions
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2. **Preserve original key**: Store the original descriptive key in the `_Token` for debugging and lookups
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3. **Custom equality**: The `__eq__` and `__hash__` methods ignore the `key` field to ensure tokens are compared by their actual shm properties
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4. **Platform detection**: Only applies shortening on macOS (`sys.platform == 'darwin'`)
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### Edge Cases to Consider
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- Token serialization across processes (the `key` field must survive IPC)
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- Token lookup in dictionaries and caches
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- Debugging output (use `key` field for human-readable names)
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---
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## 3. Shared Memory Cleanup Race Conditions
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### Problem
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During teardown, shared memory segments may be unlinked by one process while another is still trying to clean them up, causing `FileNotFoundError` to crash the application.
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### Error Message
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```
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FileNotFoundError: [Errno 2] No such file or directory: '/p_74c86c7228dd773b'
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```
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### Root Cause
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In multi-process architectures like `tractor`, multiple processes may attempt to clean up shared resources simultaneously. Race conditions during shutdown can cause:
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1. Process A unlinks the shared memory
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2. Process B tries to unlink the same memory → `FileNotFoundError`
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3. Uncaught exception crashes Process B
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### Solution
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Add defensive error handling to catch and log cleanup races:
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**File**: `piker/data/_sharedmem.py`
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```python
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class ShmArray:
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# ... existing code ...
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def destroy(self) -> None:
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'''
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Destroy the shared memory segment and cleanup OS resources.
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'''
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if _USE_POSIX:
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# We manually unlink to bypass all the "resource tracker"
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# nonsense meant for non-SC systems.
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shm = self._shm
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name = shm.name
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try:
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shm_unlink(name)
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except FileNotFoundError:
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# Might be a teardown race where another process
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# already unlinked it - this is fine, just log it
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log.warning(f'Shm for {name} already unlinked?')
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# Also cleanup the index counters
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if hasattr(self, '_first'):
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try:
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self._first.destroy()
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except FileNotFoundError:
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log.warning(f'First index shm already unlinked?')
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if hasattr(self, '_last'):
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try:
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self._last.destroy()
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except FileNotFoundError:
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log.warning(f'Last index shm already unlinked?')
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class SharedInt:
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# ... existing code ...
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def destroy(self) -> None:
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if _USE_POSIX:
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# We manually unlink to bypass all the "resource tracker"
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# nonsense meant for non-SC systems.
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name = self._shm.name
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try:
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shm_unlink(name)
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except FileNotFoundError:
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# might be a teardown race here?
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log.warning(f'Shm for {name} already unlinked?')
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```
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### Implementation Notes
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- This fix is platform-agnostic but particularly important on macOS where the shortened names make debugging harder
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- The warnings help identify cleanup races during development
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- Consider adding metrics/counters if cleanup races become frequent
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---
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## 4. Async Runtime (Trio/AsyncIO) Coordination
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### Problem
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The `TrioTaskExited` error occurs when trio tasks are cancelled while asyncio tasks are still running, indicating improper coordination between the two async runtimes.
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### Error Message
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```
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tractor._exceptions.TrioTaskExited: but the child `asyncio` task is still running?
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>>
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|_<Task pending name='Task-2' coro=<wait_on_coro_final_result()> ...>
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```
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### Root Cause
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`tractor` uses "guest mode" to run trio as a guest in asyncio's event loop (or vice versa). The error occurs when:
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1. A trio task is cancelled (e.g., user closes the UI)
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2. The cancellation propagates to cleanup handlers
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3. Cleanup tries to exit while asyncio tasks are still running
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4. The `translate_aio_errors` context manager detects this inconsistent state
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### Current State
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This issue is **partially resolved** by the other fixes (socket credentials and shared memory), which eliminate the underlying errors that trigger premature cancellation. However, it may still occur in edge cases.
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### Potential Solutions
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#### Option 1: Improve Cancellation Propagation (Tractor-level)
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**File**: `tractor/to_asyncio.py`
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```python
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async def translate_aio_errors(
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chan,
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wait_on_aio_task: bool = False,
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suppress_graceful_exits: bool = False,
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):
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'''
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Context manager to translate asyncio errors to trio equivalents.
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'''
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try:
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yield
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except trio.Cancelled:
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# When trio is cancelled, ensure asyncio tasks are also cancelled
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if wait_on_aio_task:
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# Give asyncio tasks a chance to cleanup
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await trio.lowlevel.checkpoint()
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# Check if asyncio task is still running
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if aio_task and not aio_task.done():
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# Cancel it gracefully
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aio_task.cancel()
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# Wait briefly for cancellation
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with trio.move_on_after(0.5): # 500ms timeout
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await wait_for_aio_task_completion(aio_task)
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raise # Re-raise the cancellation
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```
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#### Option 2: Proper Shutdown Sequence (Application-level)
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**File**: `piker/brokers/ib/api.py` (or similar broker modules)
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```python
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async def load_clients_for_trio(
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client: Client,
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...
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) -> None:
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'''
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Load asyncio client and keep it running for trio.
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'''
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try:
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# Setup client
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await client.connect()
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# Keep alive - but make it cancellable
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await trio.sleep_forever()
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except trio.Cancelled:
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# Explicit cleanup before propagating cancellation
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log.info("Shutting down asyncio client gracefully")
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# Disconnect client
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if client.isConnected():
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await client.disconnect()
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# Small delay to let asyncio cleanup
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await trio.sleep(0.1)
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raise # Now safe to propagate
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```
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#### Option 3: Detection and Warning (Current Approach)
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The current code detects the issue and raises a clear error. This is acceptable if:
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1. The error is rare (only during abnormal shutdown)
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2. It doesn't cause data loss
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3. Logs provide enough info for debugging
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### Recommended Approach
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For **piker**: Implement Option 2 (proper shutdown sequence) in broker modules where asyncio is used.
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For **tractor**: Consider Option 1 (improved cancellation propagation) as a library-level enhancement.
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### Testing
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Test the fix by:
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```python
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# Test graceful shutdown
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async def test_asyncio_trio_shutdown():
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async with open_channel_from(...) as (first, chan):
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# Do some work
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await chan.send(msg)
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# Trigger cancellation
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raise KeyboardInterrupt
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# Should cleanup without TrioTaskExited error
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```
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---
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## Summary of Changes
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### Files Modified in Piker
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1. **`piker/data/_sharedmem.py`**
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- Added `_shorten_key_for_macos()` function
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- Modified `_Token` class to store original `key`
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- Modified `_make_token()` to use shortened names on macOS
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- Added `FileNotFoundError` handling in `destroy()` methods
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2. **`piker/ui/_display.py`**
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- Removed assertion that checked for 'hist' in shm name (incompatible with shortened names)
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### Files to Modify in Tractor (Recommended)
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1. **`tractor/ipc/_uds.py`**
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- Make socket credential imports platform-conditional
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- Handle macOS-specific `LOCAL_PEERCRED`
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2. **`tractor/to_asyncio.py`** (Optional)
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- Improve cancellation propagation between trio and asyncio
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- Add graceful shutdown timeout for asyncio tasks
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### Platform Detection Pattern
|
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|
||||
Use this pattern consistently:
|
||||
|
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```python
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import sys
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if sys.platform == 'darwin': # macOS
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# macOS-specific code
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pass
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elif sys.platform == 'linux': # Linux
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||||
# Linux-specific code
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pass
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else:
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||||
# Other platforms / fallback
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||||
pass
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||||
```
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### Testing Checklist
|
||||
|
||||
- [ ] Test on macOS (Darwin)
|
||||
- [ ] Test on Linux
|
||||
- [ ] Test shared memory with names > 31 chars
|
||||
- [ ] Test multi-process cleanup race conditions
|
||||
- [ ] Test graceful shutdown (Ctrl+C)
|
||||
- [ ] Test abnormal shutdown (kill signal)
|
||||
- [ ] Verify no memory leaks (check `/dev/shm` on Linux, `ipcs -m` on macOS)
|
||||
|
||||
---
|
||||
|
||||
## Additional Resources
|
||||
|
||||
- **macOS System Headers**:
|
||||
- `/usr/include/sys/un.h` - Unix domain socket constants
|
||||
- `/usr/include/sys/posix_shm_internal.h` - Shared memory limits
|
||||
|
||||
- **Python Documentation**:
|
||||
- [`socket` module](https://docs.python.org/3/library/socket.html)
|
||||
- [`multiprocessing.shared_memory`](https://docs.python.org/3/library/multiprocessing.shared_memory.html)
|
||||
|
||||
- **Trio/AsyncIO**:
|
||||
- [Trio Guest Mode](https://trio.readthedocs.io/en/stable/reference-lowlevel.html#using-guest-mode-to-run-trio-on-top-of-other-event-loops)
|
||||
- [Tractor Documentation](https://github.com/goodboy/tractor)
|
||||
|
||||
---
|
||||
|
||||
## Contributing
|
||||
|
||||
When implementing these fixes in your own project:
|
||||
|
||||
1. **Test thoroughly** on both macOS and Linux
|
||||
2. **Add platform guards** to prevent cross-platform breakage
|
||||
3. **Document platform-specific behavior** in code comments
|
||||
4. **Consider CI/CD** testing on multiple platforms
|
||||
5. **Handle edge cases** gracefully with proper logging
|
||||
|
||||
If you find additional macOS-specific issues, please contribute to this guide!
|
||||
|
|
@ -19,7 +19,11 @@ NumPy compatible shared memory buffers for real-time IPC streaming.
|
|||
|
||||
"""
|
||||
from __future__ import annotations
|
||||
from sys import byteorder
|
||||
import hashlib
|
||||
from sys import (
|
||||
byteorder,
|
||||
platform,
|
||||
)
|
||||
import time
|
||||
from typing import Optional
|
||||
from multiprocessing.shared_memory import SharedMemory, _USE_POSIX
|
||||
|
|
@ -105,11 +109,12 @@ class _Token(Struct, frozen=True):
|
|||
which can be used to key a system wide post shm entry.
|
||||
|
||||
'''
|
||||
shm_name: str # this servers as a "key" value
|
||||
shm_name: str # actual OS-level name (may be shortened on macOS)
|
||||
shm_first_index_name: str
|
||||
shm_last_index_name: str
|
||||
dtype_descr: tuple
|
||||
size: int # in struct-array index / row terms
|
||||
key: str | None = None # original descriptive key (for lookup)
|
||||
|
||||
@property
|
||||
def dtype(self) -> np.dtype:
|
||||
|
|
@ -118,6 +123,31 @@ class _Token(Struct, frozen=True):
|
|||
def as_msg(self):
|
||||
return self.to_dict()
|
||||
|
||||
def __eq__(self, other) -> bool:
|
||||
'''
|
||||
Compare tokens based on shm names and dtype, ignoring the key field.
|
||||
The key field is only used for lookups, not for token identity.
|
||||
'''
|
||||
if not isinstance(other, _Token):
|
||||
return False
|
||||
return (
|
||||
self.shm_name == other.shm_name
|
||||
and self.shm_first_index_name == other.shm_first_index_name
|
||||
and self.shm_last_index_name == other.shm_last_index_name
|
||||
and self.dtype_descr == other.dtype_descr
|
||||
and self.size == other.size
|
||||
)
|
||||
|
||||
def __hash__(self) -> int:
|
||||
'''Hash based on the same fields used in __eq__'''
|
||||
return hash((
|
||||
self.shm_name,
|
||||
self.shm_first_index_name,
|
||||
self.shm_last_index_name,
|
||||
self.dtype_descr,
|
||||
self.size,
|
||||
))
|
||||
|
||||
@classmethod
|
||||
def from_msg(cls, msg: dict) -> _Token:
|
||||
if isinstance(msg, _Token):
|
||||
|
|
@ -148,6 +178,31 @@ def get_shm_token(key: str) -> _Token:
|
|||
return _known_tokens.get(key)
|
||||
|
||||
|
||||
def _shorten_key_for_macos(key: str) -> str:
|
||||
'''
|
||||
macOS has a 31 character limit for POSIX shared memory names.
|
||||
Hash long keys to fit within this limit while maintaining uniqueness.
|
||||
|
||||
'''
|
||||
# macOS shm_open() has a 31 char limit (PSHMNAMLEN)
|
||||
# Use format: /p_<hash16> where hash is first 16 hex chars of sha256
|
||||
# This gives us: / + p_ + 16 hex chars = 19 chars, well under limit
|
||||
# We keep the 'p' prefix to indicate it's from piker
|
||||
if len(key) <= 31:
|
||||
return key
|
||||
|
||||
# Create a hash of the full key
|
||||
key_hash = hashlib.sha256(key.encode()).hexdigest()[:16]
|
||||
short_key = f'p_{key_hash}'
|
||||
|
||||
log.debug(
|
||||
f'Shortened shm key for macOS:\n'
|
||||
f' original: {key} ({len(key)} chars)\n'
|
||||
f' shortened: {short_key} ({len(short_key)} chars)'
|
||||
)
|
||||
return short_key
|
||||
|
||||
|
||||
def _make_token(
|
||||
key: str,
|
||||
size: int,
|
||||
|
|
@ -159,12 +214,24 @@ def _make_token(
|
|||
|
||||
'''
|
||||
dtype = def_iohlcv_fields if dtype is None else dtype
|
||||
|
||||
# On macOS, shorten keys that exceed the 31 character limit
|
||||
if platform == 'darwin':
|
||||
shm_name = _shorten_key_for_macos(key)
|
||||
shm_first = _shorten_key_for_macos(key + "_first")
|
||||
shm_last = _shorten_key_for_macos(key + "_last")
|
||||
else:
|
||||
shm_name = key
|
||||
shm_first = key + "_first"
|
||||
shm_last = key + "_last"
|
||||
|
||||
return _Token(
|
||||
shm_name=key,
|
||||
shm_first_index_name=key + "_first",
|
||||
shm_last_index_name=key + "_last",
|
||||
shm_name=shm_name,
|
||||
shm_first_index_name=shm_first,
|
||||
shm_last_index_name=shm_last,
|
||||
dtype_descr=tuple(np.dtype(dtype).descr),
|
||||
size=size,
|
||||
key=key, # Store original key for lookup
|
||||
)
|
||||
|
||||
|
||||
|
|
@ -421,7 +488,12 @@ class ShmArray:
|
|||
if _USE_POSIX:
|
||||
# We manually unlink to bypass all the "resource tracker"
|
||||
# nonsense meant for non-SC systems.
|
||||
shm_unlink(self._shm.name)
|
||||
name = self._shm.name
|
||||
try:
|
||||
shm_unlink(name)
|
||||
except FileNotFoundError:
|
||||
# might be a teardown race here?
|
||||
log.warning(f'Shm for {name} already unlinked?')
|
||||
|
||||
self._first.destroy()
|
||||
self._last.destroy()
|
||||
|
|
@ -450,8 +522,15 @@ def open_shm_array(
|
|||
a = np.zeros(size, dtype=dtype)
|
||||
a['index'] = np.arange(len(a))
|
||||
|
||||
# Create token first to get the (possibly shortened) shm name
|
||||
token = _make_token(
|
||||
key=key,
|
||||
size=size,
|
||||
dtype=dtype,
|
||||
)
|
||||
|
||||
shm = SharedMemory(
|
||||
name=key,
|
||||
name=token.shm_name, # Use shortened name from token
|
||||
create=True,
|
||||
size=a.nbytes
|
||||
)
|
||||
|
|
@ -463,12 +542,6 @@ def open_shm_array(
|
|||
array[:] = a[:]
|
||||
array.setflags(write=int(not readonly))
|
||||
|
||||
token = _make_token(
|
||||
key=key,
|
||||
size=size,
|
||||
dtype=dtype,
|
||||
)
|
||||
|
||||
# create single entry arrays for storing an first and last indices
|
||||
first = SharedInt(
|
||||
shm=SharedMemory(
|
||||
|
|
@ -541,10 +614,11 @@ def attach_shm_array(
|
|||
|
||||
'''
|
||||
token = _Token.from_msg(token)
|
||||
key = token.shm_name
|
||||
# Use original key for _known_tokens lookup, shm_name for OS calls
|
||||
lookup_key = token.key if token.key else token.shm_name
|
||||
|
||||
if key in _known_tokens:
|
||||
assert _Token.from_msg(_known_tokens[key]) == token, "WTF"
|
||||
if lookup_key in _known_tokens:
|
||||
assert _Token.from_msg(_known_tokens[lookup_key]) == token, "WTF"
|
||||
|
||||
# XXX: ugh, looks like due to the ``shm_open()`` C api we can't
|
||||
# actually place files in a subdir, see discussion here:
|
||||
|
|
@ -555,7 +629,7 @@ def attach_shm_array(
|
|||
for _ in range(3):
|
||||
try:
|
||||
shm = SharedMemory(
|
||||
name=key,
|
||||
name=token.shm_name, # Use (possibly shortened) OS name
|
||||
create=False,
|
||||
)
|
||||
break
|
||||
|
|
@ -603,8 +677,8 @@ def attach_shm_array(
|
|||
# Stash key -> token knowledge for future queries
|
||||
# via `maybe_opepn_shm_array()` but only after we know
|
||||
# we can attach.
|
||||
if key not in _known_tokens:
|
||||
_known_tokens[key] = token
|
||||
if lookup_key not in _known_tokens:
|
||||
_known_tokens[lookup_key] = token
|
||||
|
||||
# "close" attached shm on actor teardown
|
||||
tractor.current_actor().lifetime_stack.callback(sha.close)
|
||||
|
|
|
|||
|
|
@ -212,7 +212,12 @@ async def increment_history_view(
|
|||
hist_chart: ChartPlotWidget = ds.hist_chart
|
||||
hist_viz: Viz = ds.hist_viz
|
||||
# viz: Viz = ds.viz
|
||||
assert 'hist' in hist_viz.shm.token['shm_name']
|
||||
# NOTE: On macOS, shm names are shortened to fit the 31-char limit,
|
||||
# so we can't reliably check for 'hist' in the name anymore.
|
||||
# The important thing is that hist_viz is correctly assigned from ds.
|
||||
# token = hist_viz.shm.token
|
||||
# shm_key = token.get('key') or token['shm_name']
|
||||
# assert 'hist' in shm_key
|
||||
# name: str = hist_viz.name
|
||||
|
||||
# TODO: seems this is more reliable at keeping the slow
|
||||
|
|
|
|||
Loading…
Reference in New Issue