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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /mozglue/misc/PlatformConditionVariable.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'mozglue/misc/PlatformConditionVariable.h')
-rw-r--r--mozglue/misc/PlatformConditionVariable.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/mozglue/misc/PlatformConditionVariable.h b/mozglue/misc/PlatformConditionVariable.h
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+++ b/mozglue/misc/PlatformConditionVariable.h
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+/* -*- 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