leonarski_fandClaude Opus 5
7dea9eaf9c
FFTW's planner (every fftwf_plan_* and fftwf_destroy_plan) shares global state and is not thread-safe; executing a plan is. FFTIndexerCPU and BeamCenterFFTCPU each guarded their planning with a lock of their own, TranslationalNCS and the viewer's spectrum with none, and ModelFFT with a third - which does not stop two of them planning at once. common/FFTWPlannerLock.h holds the one mutex they all now take. No numerical change. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013nW6FNRP1bBJJ8pfHiByAT
15 lines
550 B
C++
15 lines
550 B
C++
// SPDX-FileCopyrightText: 2026 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
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// SPDX-License-Identifier: GPL-3.0-only
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#pragma once
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#include <mutex>
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// FFTW's planner - every fftwf_plan_* and fftwf_destroy_plan call - shares global state and is not
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// thread-safe; executing a plan is. So every piece of code that makes or destroys a plan takes this
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// one lock, not a lock of its own: two private locks do not stop two planners running at once.
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inline std::mutex &FFTWPlannerMutex() {
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static std::mutex m;
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return m;
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}
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