kopia lustrzana https://github.com/jamescoxon/dl-fldigi
153 wiersze
4.4 KiB
C++
153 wiersze
4.4 KiB
C++
// ----------------------------------------------------------------------------
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// threads.h
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//
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// Copyright (C) 2007-2009
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// Stelios Bounanos, M0GLD
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//
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// This file is part of fldigi.
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//
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// Fldigi is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Fldigi is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with fldigi. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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#ifndef THREADS_H_
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#define THREADS_H_
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#include <config.h>
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#include <pthread.h>
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#include <stdint.h>
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#include <semaphore.h>
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#if !HAVE_SEM_TIMEDWAIT
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# include <time.h>
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int sem_timedwait(sem_t* sem, const struct timespec* abs_timeout);
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#endif
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int sem_timedwait_rel(sem_t* sem, double rel_timeout);
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int pthread_cond_timedwait_rel(pthread_cond_t* cond, pthread_mutex_t* mutex, double rel_timeout);
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//enum {
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// INVALID_TID = -1,
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// TRX_TID, QRZ_TID, RIGCTL_TID, NORIGCTL_TID, LOGBOOK_TID,
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//#if USE_XMLRPC
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// XMLRPC_TID,
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//#endif
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// ARQ_TID, ARQSOCKET_TID,
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// FLMAIN_TID,
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// NUM_THREADS, NUM_QRUNNER_THREADS = NUM_THREADS - 1
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//};
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enum {
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INVALID_TID = -1,
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TRX_TID, QRZ_TID, RIGCTL_TID, NORIGCTL_TID, EQSL_TID,
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#if USE_XMLRPC
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XMLRPC_TID,
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#endif
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ARQ_TID, ARQSOCKET_TID,
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DL_FLDIGI_TID, DL_FLDIGI_GPS_TID,
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FLMAIN_TID,
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NUM_THREADS, NUM_QRUNNER_THREADS = NUM_THREADS - 1
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};
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#ifdef __linux__
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void linux_log_tid(void);
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# define LOG_THREAD_ID() linux_log_tid()
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#else
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# define LOG_THREAD_ID() /* nothing */
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#endif
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#if USE_TLS
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# define THREAD_ID_TYPE __thread intptr_t
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# define CREATE_THREAD_ID() thread_id_ = INVALID_TID
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# define SET_THREAD_ID(x) do { thread_id_ = (x); LOG_THREAD_ID(); } while (0)
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# define GET_THREAD_ID() thread_id_
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#else
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# define THREAD_ID_TYPE pthread_key_t
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# define CREATE_THREAD_ID() pthread_key_create(&thread_id_, NULL)
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# define SET_THREAD_ID(x) do { pthread_setspecific(thread_id_, (const void *)(x + 1)); LOG_THREAD_ID(); } while (0)
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# define GET_THREAD_ID() ((intptr_t)pthread_getspecific(thread_id_) - 1)
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#endif // USE_TLS
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extern THREAD_ID_TYPE thread_id_;
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#ifndef NDEBUG
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# include "debug.h"
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bool thread_in_list(int id, const int* list);
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# define ENSURE_THREAD(...) \
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do { \
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int id_ = GET_THREAD_ID(); \
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int t_[] = { __VA_ARGS__, INVALID_TID }; \
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if (!thread_in_list(id_, t_)) \
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LOG_ERROR("bad thread context: %d", id_); \
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} while (0)
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# define ENSURE_NOT_THREAD(...) \
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do { \
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int id_ = GET_THREAD_ID(); \
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int t_[] = { __VA_ARGS__, INVALID_TID }; \
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if (thread_in_list(id_, t_)) \
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LOG_ERROR("bad thread context: %d", id_); \
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} while (0)
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#else
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# define ENSURE_THREAD(...) ((void)0)
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# define ENSURE_NOT_THREAD(...) ((void)0)
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#endif // ! NDEBUG
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// On POSIX systems we cancel threads by sending them SIGUSR2,
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// which will also interrupt blocking calls. On woe32 we use
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// pthread_cancel and there is no good/sane way to interrupt.
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#ifndef __WOE32__
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# define SET_THREAD_CANCEL() \
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do { \
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sigset_t usr2; \
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sigemptyset(&usr2); \
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sigaddset(&usr2, SIGUSR2); \
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pthread_sigmask(SIG_UNBLOCK, &usr2, NULL); \
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} while (0)
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# define TEST_THREAD_CANCEL() /* nothing */
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# define CANCEL_THREAD(t__) pthread_kill(t__, SIGUSR2)
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#else
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// threads have PTHREAD_CANCEL_ENABLE, PTHREAD_CANCEL_DEFERRED when created
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# define SET_THREAD_CANCEL() /* nothing */
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# define TEST_THREAD_CANCEL() pthread_testcancel()
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# define CANCEL_THREAD(t__) pthread_cancel(t__);
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#endif
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#include "fl_lock.h"
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/// This ensures that a mutex is always unlocked when leaving a function or block.
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class guard_lock
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{
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public:
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guard_lock(pthread_mutex_t* m);
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~guard_lock(void);
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private:
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pthread_mutex_t* mutex;
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};
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/// This wraps together a mutex and a condition variable which are used
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/// together very often for queues etc...
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class syncobj
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{
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pthread_mutex_t m_mutex ;
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pthread_cond_t m_cond ;
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public:
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syncobj();
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~syncobj();
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pthread_mutex_t * mtxp(void) { return & m_mutex; }
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void signal();
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bool wait( double seconds );
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};
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#endif // !THREADS_H_
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