n_thread_pool.h

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#ifndef NILOREA_THREAD_POOL_LIBRARY
#define NILOREA_THREAD_POOL_LIBRARY
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "n_list.h"
#include <pthread.h>
#include <semaphore.h>
 
#define NORMAL_PROC 1
#define SYNCED_PROC 2
#define DIRECT_PROC 4
#define NO_QUEUE 8
#define IDLE_PROC 16
#define WAITING_PROC 32
#define RUNNING_PROC 64
#define RUNNING_THREAD 128
#define EXITING_THREAD 256
#define EXITED_THREAD 512
#define NO_LOCK 1024
 
typedef struct THREAD_POOL_NODE {
    void* (*func)(void* param);
 
    void* param;
 
    int type;
    int state;
    int thread_state;
    pthread_t thr;
 
    sem_t th_start,
        th_end;
 
    pthread_mutex_t lock;
 
    struct THREAD_POOL* thread_pool;
 
} THREAD_POOL_NODE;
 
typedef struct THREAD_POOL {
    THREAD_POOL_NODE** thread_list;
 
    size_t max_threads;
    size_t nb_max_waiting;
    size_t nb_actives;
 
    pthread_mutex_t lock;
 
    sem_t nb_tasks;
 
    LIST* waiting_list;
 
} THREAD_POOL;
 
typedef struct THREAD_WAITING_PROC {
    void* (*func)(void* param);
    void* param;
 
} THREAD_WAITING_PROC;
 
/* get number of core of current system */
long int get_nb_cpu_cores();
/* allocate a new thread pool */
THREAD_POOL* new_thread_pool(size_t nbmaxthr, size_t nb_max_waiting);
/* add a function to run in an available thread inside a pool */
int add_threaded_process(THREAD_POOL* thread_pool, void* (*func_ptr)(void* param), void* param, int mode);
/* tell all the waiting threads to start their associated process */
int start_threaded_pool(THREAD_POOL* thread_pool);
/* wait for all the threads in the pool to terminate processing, blocking but light on the CPU as there is no polling */
int wait_for_synced_threaded_pool(THREAD_POOL* thread_pool);
/* wait for all running threads to finish */
int wait_for_threaded_pool(THREAD_POOL* thread_pool, unsigned int delay);
/* destroy all running threads */
int destroy_threaded_pool(THREAD_POOL** thread_pool, unsigned int delay);
/* try to add some waiting process on some free thread slots, else do nothing */
int refresh_thread_pool(THREAD_POOL* thread_pool);
 
#ifdef __cplusplus
}
#endif
 
#endif