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8828af4759
For pthreads platforms, we have a terribly large condition for the size of a MutexImpl that attempts to hardcode the number of words that pthread_mutex_t takes. This hardcoding isn't always correct. We originally did this to try and keep <pthread.h> includes out of the headers, but the PlatformConditionVariable.h header already includes <pthread.h> anyway, and <pthread.h> isn't so namespace-invasive as <windows.h>. So go ahead and include <pthread.h> and use the actual definition of pthread_mutex_t to size the platformData_ member.
64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_PlatformMutex_h
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#define mozilla_PlatformMutex_h
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#include "mozilla/Attributes.h"
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#include "mozilla/Move.h"
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#if !defined(XP_WIN)
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# include <pthread.h>
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#endif
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namespace mozilla {
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namespace detail {
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class ConditionVariableImpl;
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class MutexImpl
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{
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public:
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struct PlatformData;
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MFBT_API MutexImpl();
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MFBT_API ~MutexImpl();
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bool operator==(const MutexImpl& rhs) {
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return platformData_ == rhs.platformData_;
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}
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protected:
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MFBT_API void lock();
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MFBT_API void unlock();
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private:
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MutexImpl(const MutexImpl&) = delete;
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void operator=(const MutexImpl&) = delete;
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MutexImpl(MutexImpl&&) = delete;
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void operator=(MutexImpl&&) = delete;
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PlatformData* platformData();
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#if !defined(XP_WIN)
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void* platformData_[sizeof(pthread_mutex_t) / sizeof(void*)];
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static_assert(sizeof(pthread_mutex_t) / sizeof(void*) != 0 &&
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sizeof(pthread_mutex_t) % sizeof(void*) == 0,
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"pthread_mutex_t must have pointer alignment");
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#else
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void* platformData_[6];
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#endif
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friend class mozilla::detail::ConditionVariableImpl;
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};
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} // namespace detail
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} // namespace mozilla
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#endif // mozilla_PlatformMutex_h
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