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123456789101112131415161718192021222324252627282930313233343536#ifndef MPV_MP_THREAD_POOL_H#define MPV_MP_THREAD_POOL_H
#include <stdbool.h>struct mp_thread_pool;
// Create a thread pool with the given number of worker threads. This can return// NULL if the worker threads could not be created. The thread pool can be// destroyed with talloc_free(pool), or indirectly with talloc_free(ta_parent).// If there are still work items on freeing, it will block until all work items// are done, and the threads terminate.// init_threads is the number of threads created in this function (and it fails// if it could not be done). min_threads must be >=, if it's >, then the// remaining threads will be created on demand, but never destroyed.// If init_threads > 0, then mp_thread_pool_queue() can never fail.// If init_threads == 0, mp_thread_pool_create() itself can never fail.struct mp_thread_pool *mp_thread_pool_create(void *ta_parent, int init_threads, int min_threads, int max_threads);
// Queue a function to be run on a worker thread: fn(fn_ctx)// If no worker thread is currently available, it's appended to a list in memory// with unbounded size. This function always returns immediately.// Concurrent queue calls are allowed, as long as it does not overlap with// pool destruction.// This function is explicitly thread-safe.// Cannot fail if thread pool was created with at least 1 thread.bool mp_thread_pool_queue(struct mp_thread_pool *pool, void (*fn)(void *ctx), void *fn_ctx);
// Like mp_thread_pool_queue(), but only queue the item and succeed if a thread// can be reserved for the item (i.e. minimal wait time instead of unbounded).bool mp_thread_pool_run(struct mp_thread_pool *pool, void (*fn)(void *ctx), void *fn_ctx);
#endif