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// 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;
#ifdef NETDATA_INTERNAL_CHECKS
pid_t locker_pid;
size_t spins;
#endif
} SPINLOCK;
#define NETDATA_SPINLOCK_INITIALIZER \
{ .locked = false }
void netdata_spinlock_init(SPINLOCK *spinlock);
void netdata_spinlock_lock(SPINLOCK *spinlock);
void netdata_spinlock_unlock(SPINLOCK *spinlock);
bool netdata_spinlock_trylock(SPINLOCK *spinlock);
#ifdef NETDATA_TRACE_RWLOCKS
typedef enum {
RWLOCK_REQUEST_READ = (1 << 0),
RWLOCK_REQUEST_WRITE = (1 << 1),
RWLOCK_REQUEST_TRYREAD = (1 << 2),
RWLOCK_REQUEST_TRYWRITE = (1 << 3),
} LOCKER_REQUEST;
typedef struct netdata_rwlock_locker {
LOCKER_REQUEST lock;
bool got_it;
pid_t pid;
size_t refcount;
const char *tag;
const char *file;
const char *function;
unsigned long line;
struct netdata_rwlock_locker *next, *prev;
} 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
Pvoid_t lockers_pid_JudyL;
} netdata_rwlock_t;
#define NETDATA_RWLOCK_INITIALIZER { \
.rwlock_t = PTHREAD_RWLOCK_INITIALIZER, \
.readers = 0, \
.writers = 0, \
.lockers_mutex = NETDATA_MUTEX_INITIALIZER, \
.lockers = NULL, \
.lockers_pid_JudyL = 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
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