| /uspace/trunk/init/init.c |
|---|
| 33,13 → 33,22 |
| #include <stdlib.h> |
| #include <ns.h> |
| #include <thread.h> |
| #include <futex.h> |
| int a; |
| atomic_t ftx; |
| extern void utest(void *arg); |
| void utest(void *arg) |
| { |
| printf("Uspace thread started.\n"); |
| if (futex_down(&ftx) < 0) |
| printf("Futex failed.\n"); |
| if (futex_up(&ftx) < 0) |
| printf("Futex failed.\n"); |
| printf("%s in good condition.\n", __FUNCTION__); |
| for (;;) |
| ; |
| } |
| 243,6 → 252,8 |
| ipc_wait_for_call(&data, 0); |
| } |
| int main(int argc, char *argv[]) |
| { |
| int tid; |
| 255,9 → 266,28 |
| // test_connection_ipc(); |
| // test_hangup(); |
| // test_slam(); |
| futex_initialize(&ftx, 1); |
| if (futex_down(&ftx) < 0) |
| printf("Futex failed.\n"); |
| if (futex_up(&ftx) < 0) |
| printf("Futex failed.\n"); |
| if (futex_down(&ftx) < 0) |
| printf("Futex failed.\n"); |
| if ((tid = thread_create(utest, NULL, "utest") != -1)) { |
| printf("Created thread tid=%d\n", tid); |
| } |
| int i; |
| for (i = 0; i < 10000000; i++) |
| ; |
| if (futex_up(&ftx) < 0) |
| printf("Futex failed.\n"); |
| printf("Main thread exiting.\n"); |
| return 0; |
| } |
| /uspace/trunk/libc/include/futex.h |
|---|
| 0,0 → 1,38 |
| /* |
| * Copyright (C) 2006 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #ifndef __LIBC__FUTEX_H__ |
| #define __LIBC__FUTEX_H__ |
| #include <atomic.h> |
| extern void futex_initialize(atomic_t *futex, int value); |
| extern int futex_down(atomic_t *futex); |
| extern int futex_up(atomic_t *futex); |
| #endif |
| /uspace/trunk/libc/generic/futex.c |
|---|
| 0,0 → 1,56 |
| /* |
| * Copyright (C) 2006 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include <futex.h> |
| #include <atomic.h> |
| #include <libc.h> |
| #include <stdio.h> |
| void futex_initialize(atomic_t *futex, int val) |
| { |
| atomic_set(futex, val); |
| } |
| int futex_down(atomic_t *futex) |
| { |
| long val; |
| val = atomic_predec(futex); |
| if (val < 0) |
| return __SYSCALL1(SYS_FUTEX_SLEEP, (sysarg_t) &futex->count); |
| return 0; |
| } |
| int futex_up(atomic_t *futex) |
| { |
| if (atomic_preinc(futex) == 0) |
| return __SYSCALL1(SYS_FUTEX_WAKEUP, (sysarg_t) &futex->count); |
| return 0; |
| } |
| /uspace/trunk/libc/Makefile |
|---|
| 46,6 → 46,7 |
| generic/mmap.c \ |
| generic/string.c \ |
| generic/thread.c \ |
| generic/futex.c \ |
| generic/io/io.c \ |
| generic/io/print.c \ |
| malloc/malloc.c |