/* $Id$ * $URL$ * * thread handling (mutex, shmem, ...) * * Copyright (C) 2004 Michael Reinelt * Copyright (C) 2004 The LCD4Linux Team * * parts of this code are based on the old XWindow driver which is * Copyright (C) 2000 Herbert Rosmanith * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /* * exported functions: * * int mutex_create (void); * creates a mutex and treturns its ID * * void mutex_lock (int semid); * try to lock a mutex * * void mutex_unlock (int semid); * unlock a mutex * * void mutex_destroy (int semid); * release a mutex * * * int shm_create (void **buffer, int size); * create shared memory segment * * void shm_destroy (int shmid, void *buffer) ; * release shared memory segment * * int thread_create (char *name, void (*thread)(void *data), void *data); * create a new thread * */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include "debug.h" #include "thread.h" #ifdef WITH_DMALLOC #include #endif int 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); } git/commit/debian/watch?id=93d6fcc0996bced17390f2a18a19225a21588e85&follow=1'>Add debian/watch file using new git modeJonathan McCrohan3-2/+6 2018-04-08d/control: update Standards Version to 4.1.4Jonathan McCrohan2-2/+4 2018-04-08d/changelog: remove whitespaceJonathan McCrohan1-5/+11 2018-04-07New upstream version 0+git20171226.07b18ecupstream/0+git20171226.07b18ecupstreamJonathan McCrohan1167-3460/+81016 2017-06-20Release 0+git20170425.fb5fe05-1debian/0+git20170425.fb5fe05-1Jonathan McCrohan2-3/+12 2017-06-19New upstream version 0+git20170425.fb5fe05upstream/0+git20170425.fb5fe05Jonathan McCrohan16-102/+786 2017-01-05Release 0+git20161227.ac7535a-1debian/0+git20161227.ac7535a-1Jonathan McCrohan1-0/+6 2017-01-05New upstream version 0+git20161227.ac7535aupstream/0+git20161227.ac7535aJonathan McCrohan39-1522/+4879 2016-06-11Release 0+git20160503.4f192bd-1debian/0+git20160503.4f192bd-1Jonathan McCrohan1-2/+2 2016-06-11d/control: update insecure Vcs-Git URLJonathan McCrohan2-1/+2 2016-06-11d/control: update Standards Version to 3.9.8Jonathan McCrohan2-1/+9 2016-06-11Imported Upstream version 0+git20160503.4f192bdupstream/0+git20160503.4f192bdJonathan McCrohan1307-2667/+38002 2016-01-18Release 0+git20151202.3864e0a-1debian/0+git20151202.3864e0a-1Jonathan McCrohan1-2/+3 2016-01-18Imported Upstream version 0+git20151202.3864e0aJonathan McCrohan840-4057/+18230 2016-01-18Update get-vcs-snapshot.sh to reflect gbp changesJonathan McCrohan2-1/+2 2016-01-18Imported Upstream version 0+git20151202.3864e0aupstream/0+git20151202.3864e0aJonathan McCrohan840-4057/+18230 2015-05-05d/control: various fixes found by libconfig-model-dpkg-perlJonathan McCrohan2-5/+13 2015-04-01Release 0+git20150208.f2053b3-1Jonathan McCrohan1-2/+2 2015-04-01Describe changes made in snapshotJonathan McCrohan1-0/+3 2015-04-01New Upstream Snapshot (commit f2053b3)Jonathan McCrohan1-0/+6 2015-04-01Imported Upstream version 0+git20150208.f2053b3upstream/0+git20150208.f2053b3Jonathan McCrohan32-333/+483 2014-12-28Release 0+git20141218.b46a22c-1debian/0+git20141218.b46a22c-1Jonathan McCrohan1-2/+2 2014-12-28Updated AU DVB-T files; Thanks Brian Burch! (Closes LP: #1393280)Jonathan McCrohan1-0/+1 2014-12-28New Upstream Snapshot (commit b46a22c)Jonathan McCrohan1-0/+6 2014-12-28Imported Upstream version 0+git20141218.b46a22cupstream/0+git20141218.b46a22cJonathan McCrohan535-639/+317 2014-10-20Release 0+git20141009.d26b627-1debian/0+git20141009.d26b627-1Jonathan McCrohan1-2/+2 2014-10-20Fix up packaging to account for move to DVBv5Jonathan McCrohan2-2/+6 2014-10-20delete d/dtv-scan-files.install; Upstream now supplies a MakefileJonathan McCrohan2-4/+1 2014-10-15d/control: update Standards Version to 3.9.6Jonathan McCrohan2-1/+3 2014-10-15d/control: add Build-Depends on dvb-toolsJonathan McCrohan2-1/+2 2014-10-15New Upstream Snapshot (commit d26b627)Jonathan McCrohan1-0/+10 2014-10-15Imported Upstream version 0+git20141009.d26b627upstream/0+git20141009.d26b627Jonathan McCrohan2010-11120/+159271 2014-07-23Release 0+git20140611.14bd6c7-1debian/0+git20140611.14bd6c7-1Jonathan McCrohan1-2/+2 2014-07-23New Upstream Snapshot (commit 14bd6c7)Jonathan McCrohan1-2/+3 2014-07-23Imported Upstream version 0+git20140611.14bd6c7upstream/0+git20140611.14bd6c7Jonathan McCrohan7-11/+60 2014-05-13New Upstream Snapshot (commit 1246b27)Jonathan McCrohan1-0/+6 2014-05-13Imported Upstream version 0+git20140512.1246b27upstream/0+git20140512.1246b27Jonathan McCrohan391-301/+3983 2014-04-05Release 0+git20140326.cfc2975-1debian/0+git20140326.cfc2975-1Jonathan McCrohan1-2/+2 2014-04-05d/control: update Homepage (upstream has moved from Gitweb to cgit)Jonathan McCrohan2-1/+2 2014-04-05New Upstream Snapshot (commit cfc2975)Jonathan McCrohan1-0/+6 2014-04-05Imported Upstream version 0+git20140326.cfc2975upstream/0+git20140326.cfc2975Jonathan McCrohan118-656/+877 2014-01-16Release 0+git20140107.1850cf8-1debian/0+git20140107.1850cf8-1Jonathan McCrohan1-2/+2 2014-01-16Update Standards Version to 3.9.5Jonathan McCrohan2-1/+9 No changes required