int sem_down(struct proc *p, int sem)
{
if (sem < 0) {
fprintf(stderr, "sem_down: Invalid semaphor (pid %u)\n", p->pid);
return 1;
}
switch (sem_p(sem)) {
case -1:
fprintf(stderr, "sem_down: error putting semaphor down (pid %u)\n", p->pid);
return 1;
case 0:
return 0;
case 1:
if (retry_op(p) != 0) {
fprintf(stderr, "sem_down: error resetting IC (pid %u)\n", p->pid);
return 1;
}
sched_suspend(p->pid);
if (insert_proc(&sem_wq[sem], p) != 0) {
fprintf(stderr, "sem_down: error adding self to wait queue (pid %u)\n", p->pid);
return 1;
}
return 0;
default:
fprintf(stderr, "sem_down: unexpected value returned from p() (pid %u)\n", p->pid);
return 1;
}
}
bool emu_suspend(const char *file)
{
gui_busy_raii gui_busy;
FILE *fp = fopen_utf8(file, "wb");
if(!fp)
return false;
int dupfd = dup(fileno(fp));
fclose(fp);
fp = nullptr;
// gzdopen takes ownership of the fd
gzFile gzf = gzdopen(dupfd, "wb");
if(!gzf)
{
close(dupfd);
return false;
}
size_t size = sizeof(emu_snapshot) + flash_suspend_flexsize();
auto snapshot = (struct emu_snapshot *) malloc(size);
if(!snapshot)
{
gzclose(gzf);
return false;
}
snapshot->product = product;
snapshot->asic_user_flags = asic_user_flags;
// TODO: Max length
strncpy(snapshot->path_boot1, path_boot1.c_str(), sizeof(snapshot->path_boot1) - 1);
strncpy(snapshot->path_flash, path_flash.c_str(), sizeof(snapshot->path_flash) - 1);
if(!flash_suspend(snapshot)
|| !cpu_suspend(snapshot)
|| !sched_suspend(snapshot)
|| !memory_suspend(snapshot))
{
free(snapshot);
gzclose(gzf);
return false;
}
snapshot->sig = SNAPSHOT_SIG;
snapshot->version = SNAPSHOT_VER;
bool success = (size_t) gzwrite(gzf, snapshot, size) == size;
free(snapshot);
gzclose(gzf);
return success;
}
