From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- media/libcubeb/src/cubeb_utils_win.h | 67 ++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 media/libcubeb/src/cubeb_utils_win.h (limited to 'media/libcubeb/src/cubeb_utils_win.h') diff --git a/media/libcubeb/src/cubeb_utils_win.h b/media/libcubeb/src/cubeb_utils_win.h new file mode 100644 index 0000000000..48e7b1b6d0 --- /dev/null +++ b/media/libcubeb/src/cubeb_utils_win.h @@ -0,0 +1,67 @@ +/* + * Copyright © 2016 Mozilla Foundation + * + * This program is made available under an ISC-style license. See the + * accompanying file LICENSE for details. + */ + +#if !defined(CUBEB_UTILS_WIN) +#define CUBEB_UTILS_WIN + +#include "cubeb-internal.h" +#include + +/* This wraps an SRWLock to track the owner in debug mode, adapted from + NSPR and http://blogs.msdn.com/b/oldnewthing/archive/2013/07/12/10433554.aspx + */ +class owned_critical_section { +public: + owned_critical_section() + : srwlock(SRWLOCK_INIT) +#ifndef NDEBUG + , + owner(0) +#endif + { + } + + void lock() + { + AcquireSRWLockExclusive(&srwlock); +#ifndef NDEBUG + XASSERT(owner != GetCurrentThreadId() && "recursive locking"); + owner = GetCurrentThreadId(); +#endif + } + + void unlock() + { +#ifndef NDEBUG + /* GetCurrentThreadId cannot return 0: it is not a the valid thread id */ + owner = 0; +#endif + ReleaseSRWLockExclusive(&srwlock); + } + + /* This is guaranteed to have the good behaviour if it succeeds. The behaviour + is undefined otherwise. */ + void assert_current_thread_owns() + { +#ifndef NDEBUG + /* This implies owner != 0, because GetCurrentThreadId cannot return 0. */ + XASSERT(owner == GetCurrentThreadId()); +#endif + } + +private: + SRWLOCK srwlock; +#ifndef NDEBUG + DWORD owner; +#endif + + // Disallow copy and assignment because SRWLock cannot be copied. + owned_critical_section(const owned_critical_section &); + owned_critical_section & operator=(const owned_critical_section &); +}; + +#endif /* CUBEB_UTILS_WIN */ -- cgit v1.2.3