void do_parent(void)
{
int s;
char buf[2];
struct sigaction sa;
subtest = 2;
sa.sa_handler = dead_child;
sa.sa_flags = 0;
if (sigaction(SIGCHLD, &sa, NULL) == -1) err(1);
s = 0;
close(pipefdp[1]);
close(pipefdc[0]);
while(s < SWAPS) {
/* Wait for child to wake me up */
read(pipefdp[0], buf, 1);
do_calcs();
/* Wake up child */
write(pipefdc[1], buf, 1);
s++;
}
while(child_is_dead == 0) { fflush(stdout); } /* Busy wait */
quit();
}
void do_parent(void)
{
ucontext_t dummy;
int s;
s = 1;
/* Initialize FPU context and verify it's set to round to nearest. */
if (fegetround() != FE_TONEAREST) err(10, 1);
/* Now we change the rounding to something else, and this should be preserved
between context swaps. */
if (fesetround(FE_UPWARD) != 0) err(10, 2);
/* Quick check to make sure that getcontext does not reset the FPU state. */
getcontext(&dummy);
if (fegetround() != FE_UPWARD) err(10, 3);
while(s < SWAPS) {
do_calcs();
if (fegetround() != FE_UPWARD) err(10, 4);
s++;
if (swapcontext(&ctx[1], &ctx[2]) == -1) err(10, 5);
}
/* Returning to main thread through uc_link */
}
void do_child(void)
{
int s;
s = 1;
/* Initialize FPU context and verify it's set to round to nearest. */
if (fegetround() != FE_TONEAREST) err(9, 1);
/* Now we change the rounding to something else, and this should be preserved
between context swaps. */
if (fesetround(FE_DOWNWARD) != 0) err(9, 2);
while(s < SWAPS) {
s++;
if (swapcontext(&ctx[2], &ctx[1]) == -1) err(9, 2);
do_calcs();
if (fegetround() != FE_DOWNWARD) err(9, 4);
}
quit();
}
void do_child(void)
{
char buf[2];
int s;
s = 0;
close(pipefdp[0]);
close(pipefdc[1]);
while(s < SWAPS) {
do_calcs();
/* Wake up parent */
write(pipefdp[1], buf, 1);
/* Wait for parent to wake me up */
read(pipefdc[0], buf, 1);
s++;
}
exit(0);
}
