jehanne/qa/kern/tsemacquire.c

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#include <u.h>
#include <lib9.h>
int32_t nprocs = 32;
int32_t nloops = 10000;
int32_t x = 1;
int32_t incr;
void
tsemloop(void)
{
int i;
i = 0;
while(i < nloops){
if(tsemacquire(&x, 10)){
if((i % 1000) == 0)
sleep(10);
incr++;
i++;
semrelease(&x, 1);
} else {
//print("pid %d timeout\n", getpid());
}
}
exits("PASS");
}
void
semloop(void)
{
int i;
i = 0;
while(i < nloops){
if(semacquire(&x, 1)){
incr++;
i++;
semrelease(&x, 1);
} else {
sysfatal("semacquire failed");
}
}
}
void
main(void)
{
int i;
incr = 0;
for(i = 0; i < nprocs; i++){
switch(rfork(RFMEM|RFPROC)){
case -1:
sysfatal("rfork");
case 0:
tsemloop();
exits("PASS");
default:
break;
}
}
for(i = 0; i < nprocs; i++)
waitpid();
print("tsemloop incr %d\n", incr);
if(incr != nprocs*nloops){
print("FAIL\n");
exits("FAIL");
}
incr = 0;
for(i = 0; i < nprocs; i++){
switch(rfork(RFMEM|RFPROC)){
case -1:
sysfatal("rfork");
case 0:
semloop();
exits("PASS");
default:
break;
}
}
for(i = 0; i < nprocs; i++)
waitpid();
print("semloop incr %d\n", incr);
if(incr != nprocs*nloops){
print("FAIL\n");
exits("FAIL");
}
incr = 0;
for(i = 0; i < nprocs; i++){
switch(rfork(RFMEM|RFPROC)){
case -1:
sysfatal("rfork");
case 0:
if((i&1) == 0)
semloop();
else
tsemloop();
exits("PASS");
default:
break;
}
}
for(i = 0; i < nprocs; i++)
waitpid();
print("mixed incr %d\n", incr);
if(incr != nprocs*nloops){
print("FAIL\n");
exits("FAIL");
}
print("PASS\n");
exits("PASS");
}