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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /nsprpub/pr/include/prmon.h | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'nsprpub/pr/include/prmon.h')
-rw-r--r-- | nsprpub/pr/include/prmon.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/nsprpub/pr/include/prmon.h b/nsprpub/pr/include/prmon.h new file mode 100644 index 0000000000..374e298265 --- /dev/null +++ b/nsprpub/pr/include/prmon.h @@ -0,0 +1,96 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 prmon_h___ +#define prmon_h___ + +#include "prtypes.h" +#include "prinrval.h" + +PR_BEGIN_EXTERN_C + +typedef struct PRMonitor PRMonitor; + +/* +** Create a new monitor. Monitors are re-entrant locks with a single built-in +** condition variable. +** +** This may fail if memory is tight or if some operating system resource +** is low. +*/ +NSPR_API(PRMonitor*) PR_NewMonitor(void); + +/* +** Destroy a monitor. The caller is responsible for guaranteeing that the +** monitor is no longer in use. There must be no thread waiting on the monitor's +** condition variable and that the lock is not held. +** +*/ +NSPR_API(void) PR_DestroyMonitor(PRMonitor *mon); + +/* +** Enter the lock associated with the monitor. If the calling thread currently +** is in the monitor, the call to enter will silently succeed. In either case, +** it will increment the entry count by one. +*/ +NSPR_API(void) PR_EnterMonitor(PRMonitor *mon); + +/* +** Decrement the entry count associated with the monitor. If the decremented +** entry count is zero, the monitor is exited. Returns PR_FAILURE if the +** calling thread has not entered the monitor. +*/ +NSPR_API(PRStatus) PR_ExitMonitor(PRMonitor *mon); + +/* +** Wait for a notify on the monitor's condition variable. Sleep for "ticks" +** amount of time (if "ticks" is PR_INTERVAL_NO_TIMEOUT then the sleep is +** indefinite). +** +** While the thread is waiting it exits the monitor (as if it called +** PR_ExitMonitor as many times as it had called PR_EnterMonitor). When +** the wait has finished the thread regains control of the monitors lock +** with the same entry count as before the wait began. +** +** The thread waiting on the monitor will be resumed when the monitor is +** notified (assuming the thread is the next in line to receive the +** notify) or when the "ticks" timeout elapses. +** +** Returns PR_FAILURE if the caller has not entered the monitor. +*/ +NSPR_API(PRStatus) PR_Wait(PRMonitor *mon, PRIntervalTime ticks); + +/* +** Notify a thread waiting on the monitor's condition variable. If a thread +** is waiting on the condition variable (using PR_Wait) then it is awakened +** and attempts to reenter the monitor. +*/ +NSPR_API(PRStatus) PR_Notify(PRMonitor *mon); + +/* +** Notify all of the threads waiting on the monitor's condition variable. +** All of threads waiting on the condition are scheduled to reenter the +** monitor. +*/ +NSPR_API(PRStatus) PR_NotifyAll(PRMonitor *mon); + +/* +** PR_ASSERT_CURRENT_THREAD_IN_MONITOR +** If the current thread is in |mon|, this assertion is guaranteed to +** succeed. Otherwise, the behavior of this function is undefined. +*/ +#if defined(DEBUG) || defined(FORCE_PR_ASSERT) +#define PR_ASSERT_CURRENT_THREAD_IN_MONITOR(/* PRMonitor* */ mon) \ + PR_AssertCurrentThreadInMonitor(mon) +#else +#define PR_ASSERT_CURRENT_THREAD_IN_MONITOR(/* PRMonitor* */ mon) +#endif + +/* Don't call this function directly. */ +NSPR_API(void) PR_AssertCurrentThreadInMonitor(PRMonitor *mon); + +PR_END_EXTERN_C + +#endif /* prmon_h___ */ |