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/*
* misc.c
*
* Description:
* This translation unit implements miscellaneous thread functions.
*/
#include "pthread.h"
int
pthread_once(pthread_once_t *once_control,
void (*init_routine)(void))
{
/* A flag, allocated per invocation, that indicates if the amotic
test-and-set occured. */
unsigned short flag = 0;
if (once_control == NULL || init_routine == NULL)
{
return EINVAL;
}
/* FIXME: we are assuming that the `cs' object is initialised at DLL
load time. Likewise, the object should be destroyed when (if)
the DLL is unloaded. */
/* An atomic test-and-set of the "once" flag. */
EnterCriticalSection(once_control.lock);
if (_pthread_once_flag == 0)
{
flag = once_control->flag = 1;
}
LeaveCriticalSection(once_control.lock);
if (flag)
{
/* Run the init routine. */
init_routine();
}
return 0;
}
pthread_t
pthread_self(void)
{
/* It looks like a pthread_t needs to be a HANDLE, but Win32 also has
another way of identifying threads: their thread id. We hope
that all of the Win32 functions we are going to use only need
HANDLEs. The morons. */
return GetCurrentThread();
}
int
pthread_equal(pthread_t t1, pthread_t t2)
{
/* For the time being, assume that HANDLEs can be directly compared.
If not, then use the appropriate Win32 function for
comparison. */
return (t1 != t2);
}
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