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better logics in sigstack allocation on native platforms

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This commit is contained in:
gbeauche 2005-03-28 09:50:58 +00:00
parent 88b493bf38
commit f9e3fd28a1
1 changed files with 9 additions and 10 deletions
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19
SheepShaver/src/Unix/main_unix.cpp
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@ -264,22 +264,22 @@ static void build_sigregs(sigregs *srp, machine_regs *mrp)
static struct sigaltstack sig_stacks[SIG_STACK_COUNT]; // Stacks for signal handlers
static int sig_stack_id = 0; // Stack slot currently used
static inline void sig_stack_acquire(void)
static inline int sig_stack_acquire(void)
{
if (++sig_stack_id == SIG_STACK_COUNT) {
if (sig_stack_id >= SIG_STACK_COUNT) {
printf("FATAL: signal stack overflow\n");
return;
return -1;
}
sigaltstack(&sig_stacks[sig_stack_id], NULL);
return sigaltstack(&sig_stacks[sig_stack_id++], NULL);
}
static inline void sig_stack_release(void)
static inline int sig_stack_release(void)
{
if (--sig_stack_id < 0) {
if (sig_stack_id <= 0) {
printf("FATAL: signal stack underflow\n");
return;
return -1;
}
sigaltstack(&sig_stacks[sig_stack_id], NULL);
return sigaltstack(&sig_stacks[--sig_stack_id], NULL);
}
#endif
@ -576,8 +576,7 @@ int main(int argc, char **argv)
sig_stacks[i].ss_flags = 0;
sig_stacks[i].ss_size = SIG_STACK_SIZE;
}
sig_stack_id = 0;
if (sigaltstack(&sig_stacks[0], NULL) < 0) {
if (sig_stack_acquire() < 0) {
sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
ErrorAlert(str);
goto quit;