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/*
* fork.c
*
* Description:
* Implementation of fork() for POSIX threads.
*/
int
pthread_atfork(void (*prepare)(void),
void (*parent)(void),
void (*child)(void))
{
/* Push handlers (unless NULL) onto their respective stacks. */
if (prepare != NULL)
{
/* Push prepare. */
/* If push fails, return ENOMEM. */
}
if (parent != NULL)
{
/* Push parent. */
/* If push fails, return ENOMEM. */
}
if (child != NULL)
{
/* Push child. */
/* If push fails, return ENOMEM. */
}
/* Everything is okay. */
return 0;
}
/* It looks like the GNU linker is capable of selecting this version of
fork() over a version provided in more primitive libraries further down
the linker command line. */
pid_t
fork()
{
pid_t pid;
/* Pop prepare handlers here. */
/* Now call Cygwin32's fork(). */
if ((pid = _fork()) > 0)
{
/* Pop parent handlers. */
return pid;
}
else
{
/* Pop child handlers. */
/* Terminate all threads except pthread_self() using
pthread_cancel(). */
return 0;
}
/* Not reached. */
}
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