Wilfried Goesgens wrote:
pthread offers a function to forcibly end a thread.
usefull if a thread is caught in blocking I/O which makes it freeze.
-1 on _this_ approach of gwthread_cancel(), due taht we don't handle here how the kannel thread data (threadinfo) is destroyed, etc.
Consider the attached (patched) test/test_wakeup.c that does not work with this simple gwthread_cancel() approach.
Stipe
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#include <unistd.h>
#include "gwlib/gwlib.h"
static void thread1(void *arg)
{
pid_t pid;
debug("test", 0, "Sleeping");
pid = getpid();
debug("test", 0, "Thread1 pid %ld", (long)pid);
gwthread_sleep(600);
debug("test", 0, "Woke up");
}
static void thread2(void *arg)
{
pid_t pid;
debug("test", 0, "Sleeping");
pid = getpid();
debug("test", 0, "Thread2 pid %ld", (long)pid);
gwthread_sleep(600);
debug("test", 0, "Woke up");
}
int main(void)
{
pid_t pid;
long t1, t2;
int ret;
gwlib_init();
pid = getpid();
debug("test", 0, "Parent pid %ld", (long)pid);
t1 = gwthread_create(thread1, NULL);
t2 = gwthread_create(thread2, NULL);
sleep(1);
gwthread_wakeup(t1);
ret = gwthread_cancel(t2);
debug("test", 0 ,"gwthread_cancel returns: %d", ret);
gwthread_wakeup_all();
gwthread_join_all();
gwlib_shutdown();
return 0;
}
