void accept_mutex_off()
{
if (usunsetlock(uslock) == -1) {
perror("usunsetlock");
exit(-1);
}
}
void
qlock_unlock( qlockh_t qlockh )
{
#ifdef HIDDEN
qlock_t *qlockp = ( qlock_t * )qlockh;
pid_t pid;
ordmap_t *ordmapp;
/* REFERENCED */
intgen_t rval;
#endif
/* sanity checks
*/
ASSERT( qlock_inited );
/* bypass if miniroot
*/
if ( ! qlock_usp ) {
return;
}
#ifdef HIDDEN
/* get the caller's pid
*/
pid = get_pid();
/* get the ordmap for this thread
*/
ordmapp = qlock_ordmapp_get( pid );
/* verify lock is held by this thread
*/
ASSERT( QLOCK_ORDMAP_GET( *ordmapp, qlockp->ql_ord ));
ASSERT( qlockp->ql_owner == pid );
/* clear lock owner
*/
qlockp->ql_owner = 0;
/* clear lock's ord from thread's ord map
*/
QLOCK_ORDMAP_CLR( *ordmapp, qlockp->ql_ord );
/* release the us lock
*/
rval = usunsetlock( qlockp->ql_uslockh );
ASSERT( ! rval );
#endif /* HIDDEN */
}
// 0 on success, -1 fail
int vrpn_Semaphore::v()
{
#ifdef sgi
if (fUsingLock) {
if (usunsetlock(l)) {
perror("vrpn_Semaphore::v: usunsetlock:");
return -1;
}
}
else {
if (usvsema(ps)) {
perror("vrpn_Semaphore::v: uspsema:");
return -1;
}
}
#elif defined(_WIN32)
if (!ReleaseSemaphore(hSemaphore, 1, NULL)) {
// get error info from windows (from FormatMessage help page)
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, NULL,
GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
// Default language
(LPTSTR)&lpMsgBuf, 0, NULL);
fprintf(stderr,
"vrpn_Semaphore::v: error v'ing semaphore, "
"WIN32 ReleaseSemaphore call caused the following error: %s",
(LPTSTR)lpMsgBuf);
// Free the buffer.
LocalFree(lpMsgBuf);
return -1;
}
#else
// Posix by default
if (sem_post(semaphore) != 0) {
perror("vrpn_Semaphore::p: ");
return -1;
}
#endif
return 0;
}
