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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 /comm/third_party/botan/src/lib/utils/thread_utils/semaphore.cpp | |
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 '')
-rw-r--r-- | comm/third_party/botan/src/lib/utils/thread_utils/semaphore.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/utils/thread_utils/semaphore.cpp b/comm/third_party/botan/src/lib/utils/thread_utils/semaphore.cpp new file mode 100644 index 0000000000..0858a013f2 --- /dev/null +++ b/comm/third_party/botan/src/lib/utils/thread_utils/semaphore.cpp @@ -0,0 +1,38 @@ +/* +* Semaphore +* (C) 2013 Joel Low +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#include <botan/internal/semaphore.h> + +// Based on code by Pierre Gaston (http://p9as.blogspot.com/2012/06/c11-semaphores.html) + +namespace Botan { + +void Semaphore::release(size_t n) + { + for(size_t i = 0; i != n; ++i) + { + std::lock_guard<std::mutex> lock(m_mutex); + + if(m_value++ < 0) + { + ++m_wakeups; + m_cond.notify_one(); + } + } + } + +void Semaphore::acquire() + { + std::unique_lock<std::mutex> lock(m_mutex); + if(m_value-- <= 0) + { + m_cond.wait(lock, [this] { return m_wakeups > 0; }); + --m_wakeups; + } + } + +} |