headers/private/graphics/common/benaphore.h

   1 /*
   2         Copyright (c) 2002, Thomas Kurschel
   3
   4
   5         Part of Radeon driver
   6
   7         Benaphore definition
   8 */
   9
  10
  11 #ifndef _BENAPHORE_H
  12 #define _BENAPHORE_H
  13
  14
  15 typedef struct {
  16         sem_id  sem;
  17         int32   ben;
  18 } benaphore;
  19
  20
  21 #define INIT_BEN(x, prefix)     ( (x).ben = 0, (x).sem = create_sem(0, #prefix " benaphore"), (x).sem )
  22 #define ACQUIRE_BEN(x)  if((atomic_add(&(x.ben), 1)) >= 1) acquire_sem(x.sem);
  23 #define RELEASE_BEN(x)  if((atomic_add(&(x.ben), -1)) > 1) release_sem(x.sem);
  24 #define DELETE_BEN(x)   delete_sem(x.sem);
  25
  26 #endif