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Diffstat (limited to '')
-rw-r--r-- | wsrep-lib/include/wsrep/thread_service.hpp | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/wsrep-lib/include/wsrep/thread_service.hpp b/wsrep-lib/include/wsrep/thread_service.hpp new file mode 100644 index 00000000..702d71c1 --- /dev/null +++ b/wsrep-lib/include/wsrep/thread_service.hpp @@ -0,0 +1,111 @@ +/* + * Copyright (C) 2019 Codership Oy <info@codership.com> + * + * This file is part of wsrep-lib. + * + * Wsrep-lib 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 of the License, or + * (at your option) any later version. + * + * Wsrep-lib 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 wsrep-lib. If not, see <https://www.gnu.org/licenses/>. + */ + + +/** @file thread_service.hpp + * + * Service interface for threads and synchronization primitives. + * The purpose of this interface is to provider provider implementations + * means to integrate with application thread implementation. + * + * Interface is designed to resemble POSIX threads, mutexes and + * condition variables. + */ + +#ifndef WSREP_THREAD_SERVICE_HPP +#define WSREP_THREAD_SERVICE_HPP + +#include <cstddef> // size_t +#include "compiler.hpp" + +struct timespec; +struct sched_param; + +namespace wsrep +{ + + class thread_service + { + public: + + thread_service() : exit() { } + virtual ~thread_service() { } + struct thread_key { }; + struct thread { }; + struct mutex_key { }; + struct mutex { }; + struct cond_key { }; + struct cond { }; + + /** + * Method will be called before library side thread + * service initialization. + */ + virtual int before_init() = 0; + + /** + * Method will be called after library side thread service + * has been initialized. + */ + virtual int after_init() = 0; + + /* Thread */ + virtual const thread_key* create_thread_key(const char* name) WSREP_NOEXCEPT + = 0; + virtual int create_thread(const thread_key*, thread**, + void* (*fn)(void*), void*) WSREP_NOEXCEPT + = 0; + virtual int detach(thread*) WSREP_NOEXCEPT = 0; + virtual int equal(thread*, thread*) WSREP_NOEXCEPT = 0; + + /* + * This unlike others is a function pointer to + * avoid having C++ methods on thread exit codepath. + */ + WSREP_NORETURN void (*exit)(thread*, void* retval); + virtual int join(thread*, void** retval) WSREP_NOEXCEPT = 0; + virtual thread* self() WSREP_NOEXCEPT = 0; + virtual int setschedparam(thread*, int, + const struct sched_param*) WSREP_NOEXCEPT + = 0; + virtual int getschedparam(thread*, int*, struct sched_param*) WSREP_NOEXCEPT + = 0; + + /* Mutex */ + virtual const mutex_key* create_mutex_key(const char* name) WSREP_NOEXCEPT + = 0; + virtual mutex* init_mutex(const mutex_key*, void*, size_t) WSREP_NOEXCEPT = 0; + virtual int destroy(mutex*) WSREP_NOEXCEPT = 0; + virtual int lock(mutex*) WSREP_NOEXCEPT = 0; + virtual int trylock(mutex*) WSREP_NOEXCEPT = 0; + virtual int unlock(mutex*) WSREP_NOEXCEPT = 0; + + /* Condition variable */ + virtual const cond_key* create_cond_key(const char* name) WSREP_NOEXCEPT = 0; + virtual cond* init_cond(const cond_key*, void*, size_t) WSREP_NOEXCEPT = 0; + virtual int destroy(cond*) WSREP_NOEXCEPT = 0; + virtual int wait(cond*, mutex*) WSREP_NOEXCEPT = 0; + virtual int timedwait(cond*, mutex*, const struct timespec*) WSREP_NOEXCEPT + = 0; + virtual int signal(cond*) WSREP_NOEXCEPT = 0; + virtual int broadcast(cond*) WSREP_NOEXCEPT = 0; + }; +} // namespace wsrep + +#endif // WSREP_THREAD_SERVICE_HPP |