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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /mozglue/misc/PlatformConditionVariable.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'mozglue/misc/PlatformConditionVariable.h')
-rw-r--r-- | mozglue/misc/PlatformConditionVariable.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/mozglue/misc/PlatformConditionVariable.h b/mozglue/misc/PlatformConditionVariable.h new file mode 100644 index 0000000000..61fb06ade1 --- /dev/null +++ b/mozglue/misc/PlatformConditionVariable.h @@ -0,0 +1,71 @@ +/* -*- 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/. */ + +#ifndef mozilla_ConditionVariable_h +#define mozilla_ConditionVariable_h + +#include <stdint.h> + +#include <utility> + +#include "mozilla/Attributes.h" +#include "mozilla/PlatformMutex.h" +#include "mozilla/TimeStamp.h" +#if !defined(XP_WIN) && !defined(__wasi__) +# include <pthread.h> +#endif + +namespace mozilla { + +enum class CVStatus { NoTimeout, Timeout }; + +namespace detail { + +class ConditionVariableImpl { + public: + struct PlatformData; + + MFBT_API ConditionVariableImpl(); + MFBT_API ~ConditionVariableImpl(); + + // Wake one thread that is waiting on this condition. + MFBT_API void notify_one(); + + // Wake all threads that are waiting on this condition. + MFBT_API void notify_all(); + + // Atomically release |lock| and sleep the current thread of execution on + // this condition variable. + // |lock| will be re-acquired before this function returns. + // The thread may be woken from sleep from another thread via notify_one() + // or notify_all(), but may also wake spuriously. The caller should recheck + // its predicate after this function returns, typically in a while loop. + MFBT_API void wait(MutexImpl& lock); + + MFBT_API CVStatus wait_for(MutexImpl& lock, + const mozilla::TimeDuration& rel_time); + + private: + ConditionVariableImpl(const ConditionVariableImpl&) = delete; + ConditionVariableImpl& operator=(const ConditionVariableImpl&) = delete; + + PlatformData* platformData(); + +#if !defined(XP_WIN) && !defined(__wasi__) + void* platformData_[sizeof(pthread_cond_t) / sizeof(void*)]; + static_assert(sizeof(pthread_cond_t) / sizeof(void*) != 0 && + sizeof(pthread_cond_t) % sizeof(void*) == 0, + "pthread_cond_t must have pointer alignment"); +#else + void* platformData_[4]; +#endif +}; + +} // namespace detail + +} // namespace mozilla + +#endif // mozilla_ConditionVariable_h |