1 /* Linuxthreads - a simple clone()-based implementation of Posix */ 2 /* threads for Linux. */ 3 /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ 4 /* */ 5 /* This program is free software; you can redistribute it and/or */ 6 /* modify it under the terms of the GNU Library General Public License */ 7 /* as published by the Free Software Foundation; either version 2 */ 8 /* of the License, or (at your option) any later version. */ 9 /* */ 10 /* This program is distributed in the hope that it will be useful, */ 11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 13 /* GNU Library General Public License for more details. */ 14 15 //#include <signal.h> 16 //#include <kernel-features.h> 17 #include <l4/sys/thread.h> 18 #include <stdlib.h> 19 20 #include <l4/sys/types.h> 21 #include <l4/sys/semaphore.h> 22 23 /* Primitives for controlling thread execution */ 24 restart(pthread_descr th)25static __inline__ void restart(pthread_descr th) 26 { 27 l4_semaphore_up(th->p_thsem_cap); 28 } 29 suspend(pthread_descr self)30static __inline__ void suspend(pthread_descr self) 31 { 32 l4_semaphore_down(self->p_thsem_cap, L4_IPC_NEVER); 33 } 34 timedsuspend(pthread_descr self,const struct timespec * abstime)35static __inline__ int timedsuspend(pthread_descr self, 36 const struct timespec *abstime) 37 { 38 extern uint64_t __attribute__((weak)) __libc_l4_kclock_offset; 39 uint64_t clock = abstime->tv_sec * 1000000ULL + abstime->tv_nsec / 1000; 40 if (&__libc_l4_kclock_offset) 41 clock -= __libc_l4_kclock_offset; 42 l4_timeout_t timeout = L4_IPC_NEVER; 43 l4_rcv_timeout(l4_timeout_abs_u(clock, 4, l4_utcb()), &timeout); 44 l4_msgtag_t res = l4_semaphore_down(self->p_thsem_cap, timeout); 45 if (l4_error(res) == -(L4_EIPC_LO + L4_IPC_RETIMEOUT)) 46 return 0; 47 return 1; 48 } 49