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Diffstat (limited to 'drivers/webp/utils/thread.h')
-rw-r--r-- | drivers/webp/utils/thread.h | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/drivers/webp/utils/thread.h b/drivers/webp/utils/thread.h deleted file mode 100644 index 6008bb7c01..0000000000 --- a/drivers/webp/utils/thread.h +++ /dev/null @@ -1,93 +0,0 @@ -// Copyright 2011 Google Inc. All Rights Reserved. -// -// Use of this source code is governed by a BSD-style license -// that can be found in the COPYING file in the root of the source -// tree. An additional intellectual property rights grant can be found -// in the file PATENTS. All contributing project authors may -// be found in the AUTHORS file in the root of the source tree. -// ----------------------------------------------------------------------------- -// -// Multi-threaded worker -// -// Author: Skal (pascal.massimino@gmail.com) - -#ifndef WEBP_UTILS_THREAD_H_ -#define WEBP_UTILS_THREAD_H_ - -#ifdef HAVE_CONFIG_H -#include "webp/config.h" -#endif - -#include "webp/types.h" - -#ifdef __cplusplus -extern "C" { -#endif - -// 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*); - -// Platform-dependent implementation details for the worker. -typedef struct WebPWorkerImpl WebPWorkerImpl; - -// Synchronization object used to launch job in the worker thread -typedef struct { - WebPWorkerImpl* impl_; - 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; - -// The interface for all thread-worker related functions. All these functions -// must be implemented. -typedef struct { - // Must be called first, before any other method. - void (*Init)(WebPWorker* const worker); - // Must be called to initialize the object and spawn the thread. Re-entrant. - // Will potentially launch the thread. Returns false in case of error. - int (*Reset)(WebPWorker* const worker); - // Makes sure the previous work is finished. Returns true if worker->had_error - // was not set and no error condition was triggered by the working thread. - int (*Sync)(WebPWorker* const worker); - // Triggers the thread to call hook() with data1 and data2 arguments. These - // hook/data1/data2 values can be changed at any time before calling this - // function, but not be changed afterward until the next call to Sync(). - void (*Launch)(WebPWorker* const worker); - // This function is similar to Launch() except that it calls the - // hook directly instead of using a thread. Convenient to bypass the thread - // mechanism while still using the WebPWorker structs. Sync() must - // still be called afterward (for error reporting). - void (*Execute)(WebPWorker* const worker); - // Kill the thread and terminate the object. To use the object again, one - // must call Reset() again. - void (*End)(WebPWorker* const worker); -} WebPWorkerInterface; - -// Install a new set of threading functions, overriding the defaults. This -// should be done before any workers are started, i.e., before any encoding or -// decoding takes place. The contents of the interface struct are copied, it -// is safe to free the corresponding memory after this call. This function is -// not thread-safe. Return false in case of invalid pointer or methods. -WEBP_EXTERN(int) WebPSetWorkerInterface( - const WebPWorkerInterface* const winterface); - -// Retrieve the currently set thread worker interface. -WEBP_EXTERN(const WebPWorkerInterface*) WebPGetWorkerInterface(void); - -//------------------------------------------------------------------------------ - -#ifdef __cplusplus -} // extern "C" -#endif - -#endif /* WEBP_UTILS_THREAD_H_ */ |