benchmarks/checkfence/linuxlock/linuxrwlocksbig.c.in

   1 #include "lsl_protos.h"
   2
   3
   4 #define RW_LOCK_BIAS            0x001000
   5
   6 /** Example implementation of linux rw lock along with 2 thread test
   7  *  driver... */
   8
   9 typedef struct rwlock {
  10         int lock;
  11 } rwlock_t;
  12
  13
  14 void lock_init(rwlock_t *lock) {
  15   lock->lock=0;
  16 }
  17
  18 int write_trylock(rwlock_t *rw) {
  19   return lsl_cas_32(&rw->lock, 0, 1);
  20 }
  21
  22
  23 void write_unlock(rwlock_t *rw) {
  24   rw->lock=0;
  25 }
  26
  27 void foo(rwlock_t *mylock) {
  28         int flag=write_trylock(mylock);
  29         if (flag) {
  30                 write_unlock(mylock);
  31         }
  32 }
  33
  34 void bar(rwlock_t *mylock)
  35 {
  36         for(int i=0;i<PROBLEMSIZE;i++)
  37                 foo(mylock);
  38 }