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Diffstat (limited to 'third_party/jpeg-xl/lib/include/jxl/thread_parallel_runner_cxx.h')
-rw-r--r-- | third_party/jpeg-xl/lib/include/jxl/thread_parallel_runner_cxx.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/include/jxl/thread_parallel_runner_cxx.h b/third_party/jpeg-xl/lib/include/jxl/thread_parallel_runner_cxx.h new file mode 100644 index 0000000000..4974ffee87 --- /dev/null +++ b/third_party/jpeg-xl/lib/include/jxl/thread_parallel_runner_cxx.h @@ -0,0 +1,64 @@ +// Copyright (c) the JPEG XL Project Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/// @addtogroup libjxl_threads +/// @{ +/// +/// @file thread_parallel_runner_cxx.h +/// @brief C++ header-only helper for @ref thread_parallel_runner.h. +/// +/// There's no binary library associated with the header since this is a header +/// only library. + +#ifndef JXL_THREAD_PARALLEL_RUNNER_CXX_H_ +#define JXL_THREAD_PARALLEL_RUNNER_CXX_H_ + +#include <jxl/thread_parallel_runner.h> + +#include <memory> + +#if !(defined(__cplusplus) || defined(c_plusplus)) +#error \ + "This a C++ only header. Use jxl/jxl_thread_parallel_runner.h from C" \ + "sources." +#endif + +/// Struct to call JxlThreadParallelRunnerDestroy from the +/// JxlThreadParallelRunnerPtr unique_ptr. +struct JxlThreadParallelRunnerDestroyStruct { + /// Calls @ref JxlThreadParallelRunnerDestroy() on the passed runner. + void operator()(void* runner) { JxlThreadParallelRunnerDestroy(runner); } +}; + +/// std::unique_ptr<> type that calls JxlThreadParallelRunnerDestroy() when +/// releasing the runner. +/// +/// Use this helper type from C++ sources to ensure the runner is destroyed and +/// their internal resources released. +typedef std::unique_ptr<void, JxlThreadParallelRunnerDestroyStruct> + JxlThreadParallelRunnerPtr; + +/// Creates an instance of JxlThreadParallelRunner into a +/// JxlThreadParallelRunnerPtr and initializes it. +/// +/// This function returns a unique_ptr that will call +/// JxlThreadParallelRunnerDestroy() when releasing the pointer. See @ref +/// JxlThreadParallelRunnerCreate for details on the instance creation. +/// +/// @param memory_manager custom allocator function. It may be NULL. The memory +/// manager will be copied internally. +/// @param num_worker_threads the number of worker threads to create. +/// @return a @c NULL JxlThreadParallelRunnerPtr if the instance can not be +/// allocated or initialized +/// @return initialized JxlThreadParallelRunnerPtr instance otherwise. +static inline JxlThreadParallelRunnerPtr JxlThreadParallelRunnerMake( + const JxlMemoryManager* memory_manager, size_t num_worker_threads) { + return JxlThreadParallelRunnerPtr( + JxlThreadParallelRunnerCreate(memory_manager, num_worker_threads)); +} + +#endif // JXL_THREAD_PARALLEL_RUNNER_CXX_H_ + +/// @} |