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/* $Id$
 * $URL$
 *
 * thread handling (mutex, shmem, ...)
 *
 * Copyright (C) 2004 Michael Reinelt <reinelt@eunet.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * parts of this code are based on the old XWindow driver which is
 * Copyright (C) 2000 Herbert Rosmanith <herp@wildsau.idv.uni-linz.ac.at>
 *
 * This file is part of LCD4Linux.
AgeCommit message (Expand)AuthorFilesLines
2003-07-21[lcd4linux @ 2003-07-21 05:56:48 by reinelt]reinelt1-0/+2
2003-07-19[lcd4linux @ 2003-07-19 09:42:42 by reinelt]reinelt4-7/+177
2003-07-18[lcd4linux @ 2003-07-18 04:43:14 by reinelt]reinelt1-5/+4
2003-06-26[lcd4linux @ 2003-06-26 05:31:16 by reinelt]reinelt1-3/+6
2003-06-22[lcd4linux @ 2003-06-22 19:31:24 by reinelt]reinelt2-0/+128
2003-06-21[lcd4linux @ 2003-06-21 05:46:18 by reinelt]reinelt6-12/+60
2003-06-13[lcd4linux @ 2003-06-13 06:35:56 by reinelt]reinelt1-22/+100
2003-06-13[lcd4linux @ 2003-06-13 05:11:10 by reinelt]reinelt3-7/+16
2003-05-19[lcd4linux @ 2003-05-19 05:55:17 by reinelt]reinelt1-2/+5
2003-05-14[lcd4linux @ 2003-05-14 06:17:39 by reinelt]reinelt1-21/+63
2003-04-12[lcd4linux @ 2003-04-12 16:23:10 by reinelt]reinelt1-2/+6
2003-04-07[lcd4linux @ 2003-04-07 06:02:58 by reinelt]reinelt6-221/+245
2003-04-04[lcd4linux @ 2003-04-04 06:01:59 by reinelt]reinelt8-375/+516
2003-02-27[lcd4linux @ 2003-02-27 07:48:57 by reinelt]reinelt2-12/+12
2003-02-27[lcd4linux @ 2003-02-27 07:43:10 by reinelt]reinelt11-750/+2247
2003-02-24[lcd4linux @ 2003-02-24 04:50:57 by reinelt]reinelt1-25/+65
2003-02-22[lcd4linux @ 2003-02-22 07:53:09 by reinelt]reinelt23-97/+166
2003-02-22[lcd4linux @ 2003-02-22 07:23:24 by reinelt]reinelt1-88/+102
2003-02-18[lcd4linux @ 2003-02-18 06:13:44 by reinelt]reinelt2-329/+327
2003-02-17[lcd4linux @ 2003-02-17 06:06:12 by reinelt]reinelt1-1/+10
2003-02-17[lcd4linux @ 2003-02-17 04:27:58 by reinelt]reinelt13-8/+17
2002-08-19[lcd4linux @ 2002-08-19 07:36:29 by reinelt]reinelt7-359/+481
2002-08-19[lcd4linux @ 2002-08-19 04:41:20 by reinelt]reinelt20-32/+166
2002-08-18[lcd4linux @ 2002-08-18 08:11:11 by reinelt]reinelt1-26/+28
2002-08-17[lcd4linux @ 2002-08-17 14:14:21 by reinelt]reinelt3-67/+101
2002-08-17[lcd4linux @ 2002-08-17 13:10:22 by reinelt]reinelt9-182/+765
2002-08-17[lcd4linux @ 2002-08-17 12:54:08 by reinelt]reinelt1-7/+23
2002-04-30[lcd4linux @ 2002-04-30 07:20:15 by reinelt]reinelt2-173/+129
2002-04-29[lcd4linux @ 2002-04-29 11:00:25 by reinelt]reinelt14-2339/+5100
2001-09-14[lcd4linux @ 2001-09-14 05:57:06 by reinelt]reinelt1-1/+5
2001-09-13[lcd4linux @ 2001-09-13 07:40:57 by reinelt]reinelt1-0/+6
generated by cgit v1.2.3 (git 2.39.1) at 2026-05-31 03:35:26 +0000
t thread_argc; char **thread_argv; /* glibc 2.1 requires defining semun ourselves */ #ifdef _SEM_SEMUN_UNDEFINED union semun { int val; struct semid_ds *buf; unsigned short int *array; struct seminfo *__buf; }; #endif int mutex_create(void) { int semid; union semun semun; semid = semget(IPC_PRIVATE, 1, 0); if (semid == -1) { error("fatal error: semget() failed: %s", strerror(errno)); return -1; } semun.val = 1; semctl(semid, 0, SETVAL, semun); return semid; } void mutex_lock(const int semid) { struct sembuf sembuf; sembuf.sem_num = 0; sembuf.sem_op = -1; sembuf.sem_flg = 0; semop(semid, &sembuf, 1); } void mutex_unlock(const int semid) { struct sembuf sembuf; sembuf.sem_num = 0; sembuf.sem_op = 1; sembuf.sem_flg = 0; semop(semid, &sembuf, 1); } void mutex_destroy(const int semid) { union semun arg; semctl(semid, 0, IPC_RMID, arg); } int shm_create(void **buffer, const int size) { int shmid; shmid = shmget(IPC_PRIVATE, size, SHM_R | SHM_W); if (shmid == -1) { error("fatal error: shmget() failed: %s", strerror(errno)); return -1; } *buffer = shmat(shmid, NULL, 0); if (*buffer == NULL) { error("fatal error: shmat() failed: %s", strerror(errno)); return -1; } return shmid; } void shm_destroy(const int shmid, const void *buffer) { shmdt(buffer); shmctl(shmid, IPC_RMID, NULL); } int thread_create(const char *name, void (*thread) (void *data), void *data) { pid_t pid, ppid; ppid = getpid(); switch (pid = fork()) { case -1: error("fatal error: fork(%s) failed: %s", name, strerror(errno)); return -1; case 0: info("thread %s starting...", name); if (thread_argc > 0) { strncpy(thread_argv[0], name, strlen(thread_argv[0])); } thread(data); info("thread %s ended.", name); exit(0); default: info("forked process %d for thread %s", pid, name); } return pid; } int thread_destroy(const int pid) { return kill(pid, SIGKILL); }