duckstation

duckstation, but archived from the revision just before upstream changed it to a proprietary software project, this version is the libre one
git clone https://git.neptards.moe/u3shit/duckstation.git
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cubeb_utils_win.h (1542B)

      1 /*
      2  * Copyright © 2016 Mozilla Foundation
      3  *
      4  * This program is made available under an ISC-style license.  See the
      5  * accompanying file LICENSE for details.
      6  */
      7 
      8 #if !defined(CUBEB_UTILS_WIN)
      9 #define CUBEB_UTILS_WIN
     10 
     11 #include "cubeb-internal.h"
     12 #include <windows.h>
     13 
     14 /* This wraps an SRWLock to track the owner in debug mode, adapted from
     15    NSPR and http://blogs.msdn.com/b/oldnewthing/archive/2013/07/12/10433554.aspx
     16  */
     17 class owned_critical_section {
     18 public:
     19   owned_critical_section()
     20       : srwlock(SRWLOCK_INIT)
     21 #ifndef NDEBUG
     22         ,
     23         owner(0)
     24 #endif
     25   {
     26   }
     27 
     28   void lock()
     29   {
     30     AcquireSRWLockExclusive(&srwlock);
     31 #ifndef NDEBUG
     32     XASSERT(owner != GetCurrentThreadId() && "recursive locking");
     33     owner = GetCurrentThreadId();
     34 #endif
     35   }
     36 
     37   void unlock()
     38   {
     39 #ifndef NDEBUG
     40     /* GetCurrentThreadId cannot return 0: it is not a the valid thread id */
     41     owner = 0;
     42 #endif
     43     ReleaseSRWLockExclusive(&srwlock);
     44   }
     45 
     46   /* This is guaranteed to have the good behaviour if it succeeds. The behaviour
     47      is undefined otherwise. */
     48   void assert_current_thread_owns()
     49   {
     50 #ifndef NDEBUG
     51     /* This implies owner != 0, because GetCurrentThreadId cannot return 0. */
     52     XASSERT(owner == GetCurrentThreadId());
     53 #endif
     54   }
     55 
     56 private:
     57   SRWLOCK srwlock;
     58 #ifndef NDEBUG
     59   DWORD owner;
     60 #endif
     61 
     62   // Disallow copy and assignment because SRWLock cannot be copied.
     63   owned_critical_section(const owned_critical_section &);
     64   owned_critical_section & operator=(const owned_critical_section &);
     65 };
     66 
     67 #endif /* CUBEB_UTILS_WIN */