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Diffstat (limited to 'libnetdata/locks/locks.h')
| -rw-r--r-- | libnetdata/locks/locks.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/libnetdata/locks/locks.h b/libnetdata/locks/locks.h new file mode 100644 index 0000000..4d2d165 --- /dev/null +++ b/libnetdata/locks/locks.h @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_LOCKS_H +#define NETDATA_LOCKS_H 1 + +#include "../libnetdata.h" +#include "../clocks/clocks.h" + +typedef pthread_mutex_t netdata_mutex_t; +#define NETDATA_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER + +typedef struct netdata_spinlock { + bool locked; +} SPINLOCK; +#define NETDATA_SPINLOCK_INITIALIZER (SPINLOCK){ .locked = false } +void netdata_spinlock_init(SPINLOCK *spinlock); +void netdata_spinlock_lock(SPINLOCK *spinlock); +void netdata_spinlock_unlock(SPINLOCK *spinlock); + +#ifdef NETDATA_TRACE_RWLOCKS +typedef struct netdata_rwlock_locker { + pid_t pid; + const char *tag; + char lock; // 'R', 'W' + const char *file; + const char *function; + unsigned long line; + size_t callers; + usec_t start_s; + struct netdata_rwlock_t **all_caller_locks; + struct netdata_rwlock_locker *next; +} netdata_rwlock_locker; + +typedef struct netdata_rwlock_t { + pthread_rwlock_t rwlock_t; // the lock + size_t readers; // the number of reader on the lock + size_t writers; // the number of writers on the lock + netdata_mutex_t lockers_mutex; // a mutex to protect the linked list of the lock holding threads + netdata_rwlock_locker *lockers; // the linked list of the lock holding threads +} netdata_rwlock_t; + +#define NETDATA_RWLOCK_INITIALIZER { \ + .rwlock_t = PTHREAD_RWLOCK_INITIALIZER, \ + .readers = 0, \ + .writers = 0, \ + .lockers_mutex = NETDATA_MUTEX_INITIALIZER, \ + .lockers = NULL \ + } + +#else // NETDATA_TRACE_RWLOCKS + +typedef struct netdata_rwlock_t { + pthread_rwlock_t rwlock_t; +} netdata_rwlock_t; + +#define NETDATA_RWLOCK_INITIALIZER { \ + .rwlock_t = PTHREAD_RWLOCK_INITIALIZER \ + } + +#endif // NETDATA_TRACE_RWLOCKS + +int __netdata_mutex_init(netdata_mutex_t *mutex); +int __netdata_mutex_destroy(netdata_mutex_t *mutex); +int __netdata_mutex_lock(netdata_mutex_t *mutex); +int __netdata_mutex_trylock(netdata_mutex_t *mutex); +int __netdata_mutex_unlock(netdata_mutex_t *mutex); + +int __netdata_rwlock_destroy(netdata_rwlock_t *rwlock); +int __netdata_rwlock_init(netdata_rwlock_t *rwlock); +int __netdata_rwlock_rdlock(netdata_rwlock_t *rwlock); +int __netdata_rwlock_wrlock(netdata_rwlock_t *rwlock); +int __netdata_rwlock_unlock(netdata_rwlock_t *rwlock); +int __netdata_rwlock_tryrdlock(netdata_rwlock_t *rwlock); +int __netdata_rwlock_trywrlock(netdata_rwlock_t *rwlock); + +void netdata_thread_disable_cancelability(void); +void netdata_thread_enable_cancelability(void); + +#ifdef NETDATA_TRACE_RWLOCKS + +int netdata_mutex_init_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex); +int netdata_mutex_destroy_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex); +int netdata_mutex_lock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex); +int netdata_mutex_trylock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex); +int netdata_mutex_unlock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex); + +int netdata_rwlock_destroy_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock); +int netdata_rwlock_init_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock); +int netdata_rwlock_rdlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock); +int netdata_rwlock_wrlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock); +int netdata_rwlock_unlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock); +int netdata_rwlock_tryrdlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock); +int netdata_rwlock_trywrlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock); + +#define netdata_mutex_init(mutex) netdata_mutex_init_debug(__FILE__, __FUNCTION__, __LINE__, mutex) +#define netdata_mutex_destroy(mutex) netdata_mutex_init_debug(__FILE__, __FUNCTION__, __LINE__, mutex) +#define netdata_mutex_lock(mutex) netdata_mutex_lock_debug(__FILE__, __FUNCTION__, __LINE__, mutex) +#define netdata_mutex_trylock(mutex) netdata_mutex_trylock_debug(__FILE__, __FUNCTION__, __LINE__, mutex) +#define netdata_mutex_unlock(mutex) netdata_mutex_unlock_debug(__FILE__, __FUNCTION__, __LINE__, mutex) + +#define netdata_rwlock_destroy(rwlock) netdata_rwlock_destroy_debug(__FILE__, __FUNCTION__, __LINE__, rwlock) +#define netdata_rwlock_init(rwlock) netdata_rwlock_init_debug(__FILE__, __FUNCTION__, __LINE__, rwlock) +#define netdata_rwlock_rdlock(rwlock) netdata_rwlock_rdlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock) +#define netdata_rwlock_wrlock(rwlock) netdata_rwlock_wrlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock) +#define netdata_rwlock_unlock(rwlock) netdata_rwlock_unlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock) +#define netdata_rwlock_tryrdlock(rwlock) netdata_rwlock_tryrdlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock) +#define netdata_rwlock_trywrlock(rwlock) netdata_rwlock_trywrlock_debug(__FILE__, __FUNCTION__, __LINE__, rwlock) + +#else // !NETDATA_TRACE_RWLOCKS + +#define netdata_mutex_init(mutex) __netdata_mutex_init(mutex) +#define netdata_mutex_destroy(mutex) __netdata_mutex_destroy(mutex) +#define netdata_mutex_lock(mutex) __netdata_mutex_lock(mutex) +#define netdata_mutex_trylock(mutex) __netdata_mutex_trylock(mutex) +#define netdata_mutex_unlock(mutex) __netdata_mutex_unlock(mutex) + +#define netdata_rwlock_destroy(rwlock) __netdata_rwlock_destroy(rwlock) +#define netdata_rwlock_init(rwlock) __netdata_rwlock_init(rwlock) +#define netdata_rwlock_rdlock(rwlock) __netdata_rwlock_rdlock(rwlock) +#define netdata_rwlock_wrlock(rwlock) __netdata_rwlock_wrlock(rwlock) +#define netdata_rwlock_unlock(rwlock) __netdata_rwlock_unlock(rwlock) +#define netdata_rwlock_tryrdlock(rwlock) __netdata_rwlock_tryrdlock(rwlock) +#define netdata_rwlock_trywrlock(rwlock) __netdata_rwlock_trywrlock(rwlock) + +#endif // NETDATA_TRACE_RWLOCKS + +#endif //NETDATA_LOCKS_H |