diff options
Diffstat (limited to '3rdparty/SDL2/src/thread/stdcpp/SDL_syscond.cpp')
-rw-r--r-- | 3rdparty/SDL2/src/thread/stdcpp/SDL_syscond.cpp | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/3rdparty/SDL2/src/thread/stdcpp/SDL_syscond.cpp b/3rdparty/SDL2/src/thread/stdcpp/SDL_syscond.cpp deleted file mode 100644 index 976bff48792..00000000000 --- a/3rdparty/SDL2/src/thread/stdcpp/SDL_syscond.cpp +++ /dev/null @@ -1,164 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you must not - claim that you wrote the original software. If you use this software - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original software. - 3. This notice may not be removed or altered from any source distribution. -*/ -#include "../../SDL_internal.h" - -extern "C" { -#include "SDL_thread.h" -} - -#include <chrono> -#include <condition_variable> -#include <ratio> -#include <system_error> - -#include "SDL_sysmutex_c.h" - -struct SDL_cond -{ - std::condition_variable_any cpp_cond; -}; - -/* Create a condition variable */ -extern "C" -SDL_cond * -SDL_CreateCond(void) -{ - /* Allocate and initialize the condition variable */ - try { - SDL_cond * cond = new SDL_cond; - return cond; - } catch (std::system_error & ex) { - SDL_SetError("unable to create a C++ condition variable: code=%d; %s", ex.code(), ex.what()); - return NULL; - } catch (std::bad_alloc &) { - SDL_OutOfMemory(); - return NULL; - } -} - -/* Destroy a condition variable */ -extern "C" -void -SDL_DestroyCond(SDL_cond * cond) -{ - if (cond) { - delete cond; - } -} - -/* Restart one of the threads that are waiting on the condition variable */ -extern "C" -int -SDL_CondSignal(SDL_cond * cond) -{ - if (!cond) { - SDL_SetError("Passed a NULL condition variable"); - return -1; - } - - cond->cpp_cond.notify_one(); - return 0; -} - -/* Restart all threads that are waiting on the condition variable */ -extern "C" -int -SDL_CondBroadcast(SDL_cond * cond) -{ - if (!cond) { - SDL_SetError("Passed a NULL condition variable"); - return -1; - } - - cond->cpp_cond.notify_all(); - return 0; -} - -/* Wait on the condition variable for at most 'ms' milliseconds. - The mutex must be locked before entering this function! - The mutex is unlocked during the wait, and locked again after the wait. - -Typical use: - -Thread A: - SDL_LockMutex(lock); - while ( ! condition ) { - SDL_CondWait(cond, lock); - } - SDL_UnlockMutex(lock); - -Thread B: - SDL_LockMutex(lock); - ... - condition = true; - ... - SDL_CondSignal(cond); - SDL_UnlockMutex(lock); - */ -extern "C" -int -SDL_CondWaitTimeout(SDL_cond * cond, SDL_mutex * mutex, Uint32 ms) -{ - if (!cond) { - SDL_SetError("Passed a NULL condition variable"); - return -1; - } - - if (!mutex) { - SDL_SetError("Passed a NULL mutex variable"); - return -1; - } - - try { - std::unique_lock<std::recursive_mutex> cpp_lock(mutex->cpp_mutex, std::adopt_lock_t()); - if (ms == SDL_MUTEX_MAXWAIT) { - cond->cpp_cond.wait( - cpp_lock - ); - cpp_lock.release(); - return 0; - } else { - auto wait_result = cond->cpp_cond.wait_for( - cpp_lock, - std::chrono::duration<Uint32, std::milli>(ms) - ); - cpp_lock.release(); - if (wait_result == std::cv_status::timeout) { - return SDL_MUTEX_TIMEDOUT; - } else { - return 0; - } - } - } catch (std::system_error & ex) { - SDL_SetError("unable to wait on a C++ condition variable: code=%d; %s", ex.code(), ex.what()); - return -1; - } -} - -/* Wait on the condition variable forever */ -extern "C" -int -SDL_CondWait(SDL_cond * cond, SDL_mutex * mutex) -{ - return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT); -} - -/* vi: set ts=4 sw=4 expandtab: */ |