mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-28 08:35:41 +00:00
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
|
/*
|
||
|
|
* 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 <windows.h>
|
||
|
|
#include "cubeb-internal.h"
|
||
|
|
|
||
|
|
/* This wraps a critical section 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()
|
||
|
|
#ifndef NDEBUG
|
||
|
|
: owner(0)
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
InitializeCriticalSection(&critical_section);
|
||
|
|
}
|
||
|
|
|
||
|
|
~owned_critical_section()
|
||
|
|
{
|
||
|
|
DeleteCriticalSection(&critical_section);
|
||
|
|
}
|
||
|
|
|
||
|
|
void lock()
|
||
|
|
{
|
||
|
|
EnterCriticalSection(&critical_section);
|
||
|
|
#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
|
||
|
|
LeaveCriticalSection(&critical_section);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 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:
|
||
|
|
CRITICAL_SECTION critical_section;
|
||
|
|
#ifndef NDEBUG
|
||
|
|
DWORD owner;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Disallow copy and assignment because CRICICAL_SECTION cannot be copied.
|
||
|
|
owned_critical_section(const owned_critical_section&);
|
||
|
|
owned_critical_section& operator=(const owned_critical_section&);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif /* CUBEB_UTILS_WIN */
|