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/*
* $Id:$
* sproc version
* by Wolfram Gloger 2001, 2004, 2006
*/
#include <stdio.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/prctl.h>
#ifndef STACKSIZE
#define STACKSIZE 32768
#endif
struct thread_st {
char *sp; /* stack pointer, can be 0 */
void (*func)(struct thread_st* st); /* must be set by user */
int id;
int flags;
struct user_data u;
};
static void
thread_init(void)
{
printf("Using sproc() threads.\n");
}
static void
thread_wrapper(void *ptr, size_t stack_len)
{
struct thread_st *st = (struct thread_st*)ptr;
/*printf("begin %p\n", st->sp);*/
st->func(st);
/*printf("end %p\n", st->sp);*/
}
/* Create a thread. */
static int
thread_create(struct thread_st *st)
{
st->flags = 0;
if(!st->sp)
st->sp = malloc(STACKSIZE);
if(!st->sp) return -1;
st->id = sprocsp(thread_wrapper, PR_SALL, st, st->sp+STACKSIZE, STACKSIZE);
if(st->id < 0) {
return -1;
}
return 0;
}
/* Wait for one of several subthreads to finish. */
static void
wait_for_thread(struct thread_st st[], int n_thr,
int (*end_thr)(struct thread_st*))
{
int i;
int id;
int status = 0;
id = wait(&status);
if(status != 0) {
if(WIFSIGNALED(status))
printf("thread %id terminated by signal %d\n",
id, WTERMSIG(status));
else
printf("thread %id exited with status %d\n",
id, WEXITSTATUS(status));
}
for(i=0; i<n_thr; i++)
if(id == st[i].id) {
if(end_thr)
end_thr(&st[i]);
break;
}
}
/*
* Local variables:
* tab-width: 4
* End:
*/
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