src/thread/stdcpp/SDL_sysmutex.cpp
author David Ludwig
Tue, 20 Aug 2013 21:54:34 -0400
changeset 8484 7258989352eb
parent 8360 7f1bc00e59fc
child 8488 bb48911cd9c8
permissions -rw-r--r--
WinRT: made the C++11-based threading backend only try to catch exceptions that it knows it (the threading APIs) might throw, rather than all exceptions
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "SDL_config.h"
    22 
    23 extern "C" {
    24 #include "SDL_thread.h"
    25 #include "SDL_systhread_c.h"
    26 #include "SDL_log.h"
    27 }
    28 
    29 #include <system_error>
    30 
    31 #include "SDL_sysmutex_c.h"
    32 #include <Windows.h>
    33 
    34 
    35 /* Create a mutex */
    36 extern "C"
    37 SDL_mutex *
    38 SDL_CreateMutex(void)
    39 {
    40     /* Allocate and initialize the mutex */
    41     try {
    42         SDL_mutex * mutex = new SDL_mutex;
    43         return mutex;
    44     } catch (std::system_error & ex) {
    45         SDL_SetError("unable to create a C++ mutex: code=%d; %s", ex.code(), ex.what());
    46         return NULL;
    47     } catch (std::bad_alloc &) {
    48         SDL_OutOfMemory();
    49         return NULL;
    50     }
    51 }
    52 
    53 /* Free the mutex */
    54 extern "C"
    55 void
    56 SDL_DestroyMutex(SDL_mutex * mutex)
    57 {
    58     if (mutex) {
    59         delete mutex;
    60     }
    61 }
    62 
    63 /* Lock the semaphore */
    64 extern "C"
    65 int
    66 SDL_mutexP(SDL_mutex * mutex)
    67 {
    68     SDL_threadID threadID = SDL_ThreadID();
    69     DWORD realThreadID = GetCurrentThreadId();
    70     if (mutex == NULL) {
    71         SDL_SetError("Passed a NULL mutex");
    72         return -1;
    73     }
    74 
    75     try {
    76         mutex->cpp_mutex.lock();
    77         return 0;
    78     } catch (std::system_error & ex) {
    79         SDL_SetError("unable to lock a C++ mutex: code=%d; %s", ex.code(), ex.what());
    80         return -1;
    81     }
    82 }
    83 
    84 /* Unlock the mutex */
    85 extern "C"
    86 int
    87 SDL_mutexV(SDL_mutex * mutex)
    88 {
    89     SDL_threadID threadID = SDL_ThreadID();
    90     DWORD realThreadID = GetCurrentThreadId();
    91     if (mutex == NULL) {
    92         SDL_SetError("Passed a NULL mutex");
    93         return -1;
    94     }
    95 
    96     mutex->cpp_mutex.unlock();
    97     return 0;
    98 }
    99 
   100 /* vi: set ts=4 sw=4 expandtab: */