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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
| commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
| tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /xpcom/threads/RecursiveMutex.cpp | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-37a0381f8351b370577b65028ba1f6563ae23fdf.tar.xz firefox-esr-37a0381f8351b370577b65028ba1f6563ae23fdf.zip | |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xpcom/threads/RecursiveMutex.cpp')
| -rw-r--r-- | xpcom/threads/RecursiveMutex.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/xpcom/threads/RecursiveMutex.cpp b/xpcom/threads/RecursiveMutex.cpp new file mode 100644 index 0000000000..7c45052c07 --- /dev/null +++ b/xpcom/threads/RecursiveMutex.cpp @@ -0,0 +1,85 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/RecursiveMutex.h" + +#ifdef XP_WIN +# include <windows.h> + +# define NativeHandle(m) (reinterpret_cast<CRITICAL_SECTION*>(&m)) +#endif + +namespace mozilla { + +RecursiveMutex::RecursiveMutex(const char* aName) + : BlockingResourceBase(aName, eRecursiveMutex) +#ifdef DEBUG + , + mOwningThread(nullptr), + mEntryCount(0) +#endif +{ +#ifdef XP_WIN + // This number was adapted from NSPR. + static const DWORD sLockSpinCount = 100; + +# if defined(RELEASE_OR_BETA) + // Vista and later automatically allocate and subsequently leak a debug info + // object for each critical section that we allocate unless we tell the + // system not to do that. + DWORD flags = CRITICAL_SECTION_NO_DEBUG_INFO; +# else + DWORD flags = 0; +# endif + BOOL r = + InitializeCriticalSectionEx(NativeHandle(mMutex), sLockSpinCount, flags); + MOZ_RELEASE_ASSERT(r); +#else + pthread_mutexattr_t attr; + + MOZ_RELEASE_ASSERT(pthread_mutexattr_init(&attr) == 0, + "pthread_mutexattr_init failed"); + + MOZ_RELEASE_ASSERT( + pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) == 0, + "pthread_mutexattr_settype failed"); + + MOZ_RELEASE_ASSERT(pthread_mutex_init(&mMutex, &attr) == 0, + "pthread_mutex_init failed"); + + MOZ_RELEASE_ASSERT(pthread_mutexattr_destroy(&attr) == 0, + "pthread_mutexattr_destroy failed"); +#endif +} + +RecursiveMutex::~RecursiveMutex() { +#ifdef XP_WIN + DeleteCriticalSection(NativeHandle(mMutex)); +#else + MOZ_RELEASE_ASSERT(pthread_mutex_destroy(&mMutex) == 0, + "pthread_mutex_destroy failed"); +#endif +} + +void RecursiveMutex::LockInternal() { +#ifdef XP_WIN + EnterCriticalSection(NativeHandle(mMutex)); +#else + MOZ_RELEASE_ASSERT(pthread_mutex_lock(&mMutex) == 0, + "pthread_mutex_lock failed"); +#endif +} + +void RecursiveMutex::UnlockInternal() { +#ifdef XP_WIN + LeaveCriticalSection(NativeHandle(mMutex)); +#else + MOZ_RELEASE_ASSERT(pthread_mutex_unlock(&mMutex) == 0, + "pthread_mutex_unlock failed"); +#endif +} + +} // namespace mozilla |