120 lines
6.2 KiB
C
120 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#ifndef NETDATA_LOCKS_H
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#define NETDATA_LOCKS_H 1
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#include "../libnetdata.h"
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#include "../clocks/clocks.h"
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typedef pthread_mutex_t netdata_mutex_t;
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#define NETDATA_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
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#ifdef NETDATA_TRACE_RWLOCKS
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typedef struct netdata_rwlock_locker {
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pid_t pid;
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const char *tag;
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char lock; // 'R', 'W'
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const char *file;
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const char *function;
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unsigned long line;
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size_t callers;
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usec_t start_s;
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struct netdata_rwlock_t **all_caller_locks;
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struct netdata_rwlock_locker *next;
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} netdata_rwlock_locker;
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typedef struct netdata_rwlock_t {
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pthread_rwlock_t rwlock_t; // the lock
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size_t readers; // the number of reader on the lock
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size_t writers; // the number of writers on the lock
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netdata_mutex_t lockers_mutex; // a mutex to protect the linked list of the lock holding threads
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netdata_rwlock_locker *lockers; // the linked list of the lock holding threads
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} netdata_rwlock_t;
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#define NETDATA_RWLOCK_INITIALIZER { \
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.rwlock_t = PTHREAD_RWLOCK_INITIALIZER, \
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.readers = 0, \
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.writers = 0, \
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.lockers_mutex = NETDATA_MUTEX_INITIALIZER, \
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.lockers = NULL \
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}
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#else // NETDATA_TRACE_RWLOCKS
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typedef struct netdata_rwlock_t {
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pthread_rwlock_t rwlock_t;
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} netdata_rwlock_t;
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#define NETDATA_RWLOCK_INITIALIZER { \
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.rwlock_t = PTHREAD_RWLOCK_INITIALIZER \
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}
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#endif // NETDATA_TRACE_RWLOCKS
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extern int __netdata_mutex_init(netdata_mutex_t *mutex);
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extern int __netdata_mutex_destroy(netdata_mutex_t *mutex);
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extern int __netdata_mutex_lock(netdata_mutex_t *mutex);
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extern int __netdata_mutex_trylock(netdata_mutex_t *mutex);
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extern int __netdata_mutex_unlock(netdata_mutex_t *mutex);
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extern int __netdata_rwlock_destroy(netdata_rwlock_t *rwlock);
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extern int __netdata_rwlock_init(netdata_rwlock_t *rwlock);
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extern int __netdata_rwlock_rdlock(netdata_rwlock_t *rwlock);
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extern int __netdata_rwlock_wrlock(netdata_rwlock_t *rwlock);
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extern int __netdata_rwlock_unlock(netdata_rwlock_t *rwlock);
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extern int __netdata_rwlock_tryrdlock(netdata_rwlock_t *rwlock);
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extern int __netdata_rwlock_trywrlock(netdata_rwlock_t *rwlock);
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extern void netdata_thread_disable_cancelability(void);
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extern void netdata_thread_enable_cancelability(void);
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#ifdef NETDATA_TRACE_RWLOCKS
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extern int netdata_mutex_init_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex);
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extern int netdata_mutex_destroy_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex);
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extern int netdata_mutex_lock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex);
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extern int netdata_mutex_trylock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex);
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extern int netdata_mutex_unlock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex);
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extern int netdata_rwlock_destroy_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock);
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extern int netdata_rwlock_init_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock);
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extern int netdata_rwlock_rdlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock);
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extern int netdata_rwlock_wrlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock);
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extern int netdata_rwlock_unlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock);
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extern int netdata_rwlock_tryrdlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock);
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extern int netdata_rwlock_trywrlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock);
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#define netdata_mutex_init(mutex) netdata_mutex_init_debug(__FILE__, __FUNCTION__, __LINE__, mutex)
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#define netdata_mutex_destroy(mutex) netdata_mutex_init_debug(__FILE__, __FUNCTION__, __LINE__, mutex)
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#define netdata_mutex_lock(mutex) netdata_mutex_lock_debug(__FILE__, __FUNCTION__, __LINE__, mutex)
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#define netdata_mutex_trylock(mutex) netdata_mutex_trylock_debug(__FILE__, __FUNCTION__, __LINE__, mutex)
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#define netdata_mutex_unlock(mutex) netdata_mutex_unlock_debug(__FILE__, __FUNCTION__, __LINE__, mutex)
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#define netdata_rwlock_destroy(rwlock) netdata_rwlock_destroy_debug(__FILE__, __FUNCTION__, __LINE__, rwlock)
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#define netdata_rwlock_init(rwlock) netdata_rwlock_init_debug(__FILE__, __FUNCTION__, __LINE__, rwlock)
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#define netdata_rwlock_rdlock(rwlock) netdata_rwlock_rdlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock)
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#define netdata_rwlock_wrlock(rwlock) netdata_rwlock_wrlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock)
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#define netdata_rwlock_unlock(rwlock) netdata_rwlock_unlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock)
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#define netdata_rwlock_tryrdlock(rwlock) netdata_rwlock_tryrdlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock)
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#define netdata_rwlock_trywrlock(rwlock) netdata_rwlock_trywrlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock)
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#else // !NETDATA_TRACE_RWLOCKS
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#define netdata_mutex_init(mutex) __netdata_mutex_init(mutex)
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#define netdata_mutex_destroy(mutex) __netdata_mutex_destroy(mutex)
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#define netdata_mutex_lock(mutex) __netdata_mutex_lock(mutex)
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#define netdata_mutex_trylock(mutex) __netdata_mutex_trylock(mutex)
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#define netdata_mutex_unlock(mutex) __netdata_mutex_unlock(mutex)
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#define netdata_rwlock_destroy(rwlock) __netdata_rwlock_destroy(rwlock)
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#define netdata_rwlock_init(rwlock) __netdata_rwlock_init(rwlock)
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#define netdata_rwlock_rdlock(rwlock) __netdata_rwlock_rdlock(rwlock)
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#define netdata_rwlock_wrlock(rwlock) __netdata_rwlock_wrlock(rwlock)
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#define netdata_rwlock_unlock(rwlock) __netdata_rwlock_unlock(rwlock)
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#define netdata_rwlock_tryrdlock(rwlock) __netdata_rwlock_tryrdlock(rwlock)
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#define netdata_rwlock_trywrlock(rwlock) __netdata_rwlock_trywrlock(rwlock)
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#endif // NETDATA_TRACE_RWLOCKS
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#endif //NETDATA_LOCKS_H
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