c/pthread_extra/pthread_extra.h

   1 #ifndef __PTHREAD_EXTRA_H__
   2 #define __PTHREAD_EXTRA_H__
   3
   4 #include <pthread.h>
   5 #include <time.h>
   6 #include <stdbool.h>
   7 #include <stdint.h>
   8 #include <signal.h>
   9
  10 #define PTHREAD_XTIME_NOBLOCK (&(struct timespec){ .tv_sec = 0, .tv_nsec = 0 })
  11 #define PTHREAD_XTIME_FOREVER NULL
  12
  13 //Pausing
  14
  15 #define PTHREAD_XSIG_STOP (SIGRTMIN+0)
  16 #define PTHREAD_XSIG_CONT (SIGRTMIN+1)
  17 #define PTHREAD_XSIGRTMIN (SIGRTMIN+2) //First unused RT signal
  18
  19 #define pthread_pause(t)   (pthread_kill((t), PTHREAD_XSIG_STOP));
  20 #define pthread_unpause(t) (pthread_kill((t), PTHREAD_XSIG_CONT));
  21
  22 void pthread_unpause_handler();
  23 void pthread_pause_handler();
  24 void pthread_pause_enable();
  25
  26 // Message queues
  27
  28 #define PTHREAD_XMQ_FRONT true
  29 #define PTHREAD_XMQ_BACK false
  30
  31 #define PTHREAD_XMQ_RECV false
  32 #define PTHREAD_XMQ_PEEK true
  33
  34 typedef struct pthread_mq_t {
  35         pthread_mutex_t lock;
  36         pthread_cond_t cond_readable;
  37         pthread_cond_t cond_writable;
  38         uint8_t * data;
  39         size_t msg_size;
  40         size_t msg_count;
  41         size_t msg_count_max;
  42         size_t head_idx;
  43         char * name;
  44 } pthread_mq_t;
  45
  46 bool pthread_mq_init(pthread_mq_t *mq, size_t msg_size, size_t msg_count_max);
  47 void pthread_mq_free(pthread_mq_t *mq);
  48 size_t pthread_mq_waiting(pthread_mq_t *mq);
  49 bool pthread_mq_reset(pthread_mq_t *mq);
  50 bool pthread_mq_send_generic(pthread_mq_t *mq, void * data, bool to_front, const struct timespec *restrict abs_timeout);
  51 bool pthread_mq_receive_generic(pthread_mq_t *mq, void * data, bool peek, const struct timespec *restrict abs_timeout);
  52
  53 // Multi mutex locking
  54
  55 #define pthread_mutex_swap(a, b) { pthread_mutex_t *s; s = (a); a = (b); b = s; }
  56
  57 #define pthread_mutex_lock_two(a,b) pthread_mutex_timedlock_multi_generic((pthread_mutex_t *[2]){(a), (b)}, 2, true, NULL)
  58 #define pthread_mutex_timedlock_two(a,b,tm) pthread_mutex_timedlock_multi_generic((pthread_mutex_t *[2]){(a), (b)}, 2, true, (tm))
  59 #define pthread_mutex_trylock_two(a,b) pthread_mutex_timedlock_multi_generic((pthread_mutex_t *[2]){(a), (b)}, 2, false, NULL)
  60
  61 #define pthread_mutex_lock_multi(lcks,cnt) pthread_mutex_timedlock_multi_generic((lcks),(cnt),true,NULL)
  62 #define pthread_mutex_timedlock_multi(lcks,cnt,tm) pthread_mutex_timedlock_multi_generic((lcks),(cnt),true,(tm))
  63 #define pthread_mutex_trylock_multi(lcks,cnt) pthread_mutex_timedlock_multi_generic((lcks),(cnt),false,NULL)
  64
  65 int pthread_mutex_timedlock_multi_generic(pthread_mutex_t **lck, int cnt, bool block, const struct timespec *restrict abs_timeout);
  66
  67
  68 #endif //__PTHREAD_EXTRA_H__