mirror of https://github.com/axmolengine/axmol.git
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
// Copyright 2011 Google Inc. All Rights Reserved.
|
|
//
|
|
// This code is licensed under the same terms as WebM:
|
|
// Software License Agreement: http://www.webmproject.org/license/software/
|
|
// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
|
|
// -----------------------------------------------------------------------------
|
|
//
|
|
// Multi-threaded worker
|
|
//
|
|
// Author: Skal (pascal.massimino@gmail.com)
|
|
|
|
#ifndef WEBP_UTILS_THREAD_H_
|
|
#define WEBP_UTILS_THREAD_H_
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if WEBP_USE_THREAD
|
|
|
|
#if defined(_WIN32)
|
|
|
|
#include <windows.h>
|
|
typedef HANDLE pthread_t;
|
|
typedef CRITICAL_SECTION pthread_mutex_t;
|
|
typedef struct {
|
|
HANDLE waiting_sem_;
|
|
HANDLE received_sem_;
|
|
HANDLE signal_event_;
|
|
} pthread_cond_t;
|
|
|
|
#else
|
|
|
|
#include <pthread.h>
|
|
|
|
#endif /* _WIN32 */
|
|
#endif /* WEBP_USE_THREAD */
|
|
|
|
// State of the worker thread object
|
|
typedef enum {
|
|
NOT_OK = 0, // object is unusable
|
|
OK, // ready to work
|
|
WORK // busy finishing the current task
|
|
} WebPWorkerStatus;
|
|
|
|
// Function to be called by the worker thread. Takes two opaque pointers as
|
|
// arguments (data1 and data2), and should return false in case of error.
|
|
typedef int (*WebPWorkerHook)(void*, void*);
|
|
|
|
// Synchronize object used to launch job in the worker thread
|
|
typedef struct {
|
|
#if WEBP_USE_THREAD
|
|
pthread_mutex_t mutex_;
|
|
pthread_cond_t condition_;
|
|
pthread_t thread_;
|
|
#endif
|
|
WebPWorkerStatus status_;
|
|
WebPWorkerHook hook; // hook to call
|
|
void* data1; // first argument passed to 'hook'
|
|
void* data2; // second argument passed to 'hook'
|
|
int had_error; // return value of the last call to 'hook'
|
|
} WebPWorker;
|
|
|
|
// Must be called first, before any other method.
|
|
void WebPWorkerInit(WebPWorker* const worker);
|
|
// Must be called initialize the object and spawn the thread. Re-entrant.
|
|
// Will potentially launch the thread. Returns false in case of error.
|
|
int WebPWorkerReset(WebPWorker* const worker);
|
|
// Make sure the previous work is finished. Returns true if worker->had_error
|
|
// was not set and not error condition was triggered by the working thread.
|
|
int WebPWorkerSync(WebPWorker* const worker);
|
|
// Trigger the thread to call hook() with data1 and data2 argument. These
|
|
// hook/data1/data2 can be changed at any time before calling this function,
|
|
// but not be changed afterward until the next call to WebPWorkerSync().
|
|
void WebPWorkerLaunch(WebPWorker* const worker);
|
|
// Kill the thread and terminate the object. To use the object again, one
|
|
// must call WebPWorkerReset() again.
|
|
void WebPWorkerEnd(WebPWorker* const worker);
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
} // extern "C"
|
|
#endif
|
|
|
|
#endif /* WEBP_UTILS_THREAD_H_ */
|