guicast/condition.h

   1 #ifndef CONDITION_H
   2 #define CONDITION_H
   3
   4 #include <pthread.h>
   5
   6 class Condition
   7 {
   8 public:
   9         Condition(int init_value = 0, char *title = 0, int is_binary = 0);
  10         ~Condition();
  11
  12
  13 // Reset to init_value whether locked or not.
  14         void reset();
  15 // Block if value <= 0, then decrease value
  16         void lock(char *location = 0);
  17 // Increase value
  18         void unlock();
  19 // Block for requested duration if value <= 0.
  20 // value is decreased whether or not the condition is unlocked in time
  21 // Returns 1 if timeout or 0 if success.
  22         int timed_lock(int microseconds, char *location = 0);
  23         int get_value();
  24
  25     pthread_cond_t cond;
  26     pthread_mutex_t mutex;
  27     int value;
  28         int init_value;
  29         int is_binary;
  30         char *title;
  31 };
  32
  33
  34 #endif
  35 /*
  36 //      Local Variables:
  37 //      mode: C++
  38 //      c-file-style: "linux"
  39 //      End:
  40 */