From c82ee1c2cdf492a05e4bf3d3d151205e50c9b603 Mon Sep 17 00:00:00 2001 From: Test_User Date: Tue, 18 Jun 2024 02:18:46 -0400 Subject: Optional futex support, increased spam limit --- mutex.h | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 mutex.h (limited to 'mutex.h') diff --git a/mutex.h b/mutex.h new file mode 100644 index 0000000..cab4018 --- /dev/null +++ b/mutex.h @@ -0,0 +1,83 @@ +// Written by: Test_User +// +// This is free and unencumbered software released into the public +// domain. +// +// Anyone is free to copy, modify, publish, use, compile, sell, or +// distribute this software, either in source code form or as a compiled +// binary, for any purpose, commercial or non-commercial, and by any +// means. +// +// In jurisdictions that recognize copyright laws, the author or authors +// of this software dedicate any and all copyright interest in the +// software to the public domain. We make this dedication for the benefit +// of the public at large and to the detriment of our heirs and +// successors. We intend this dedication to be an overt act of +// relinquishment in perpetuity of all present and future rights to this +// software under copyright law. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR +// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +// OTHER DEALINGS IN THE SOFTWARE. + +#pragma once + +#ifdef USE_FUTEX + +#include +#include +#include +#include + +#define SETUP_MUTEX() 0 +#define MUTEX_TYPE uint32_t + +inline int mutex_init(uint32_t *futex) { + *futex = 0; + return 0; +} + +inline void mutex_lock(uint32_t *futex) { + uint32_t val; + while (val = __sync_lock_test_and_set(futex, 1)) + syscall(SYS_futex, futex, FUTEX_WAIT, val, 0, 0, 0); +} + +inline void mutex_unlock(uint32_t *futex) { + __sync_lock_release(futex); + syscall(SYS_futex, futex, FUTEX_WAKE, 1, 0, 0, 0); +} + +inline void mutex_destroy(uint32_t *futex) { + return; +} + +#else + +#include + +#define SETUP_MUTEX() pthread_mutexattr_init(&pthread_mutexattr) +#define MUTEX_TYPE pthread_mutex_t + +extern pthread_mutexattr_t pthread_mutexattr; +inline int mutex_init(pthread_mutex_t *mutex) { + return pthread_mutex_init(mutex, &pthread_mutexattr); +} + +inline void mutex_lock(pthread_mutex_t *mutex) { + pthread_mutex_lock(mutex); +} + +inline void mutex_unlock(pthread_mutex_t *mutex) { + pthread_mutex_unlock(mutex); +} + +inline void mutex_destroy(pthread_mutex_t *mutex) { + pthread_mutex_destroy(mutex); +} + +#endif -- cgit v1.2.3