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incubator-nuttx/include/pthread.h

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/****************************************************************************
* include/pthread.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_PTHREAD_H
#define __INCLUDE_PTHREAD_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h> /* Default settings */
#include <nuttx/compiler.h> /* Compiler settings, noreturn_function */
#include <sys/types.h> /* Needed for general types */
#include <stdint.h> /* C99 fixed width integer types */
#include <stdbool.h> /* C99 boolean types */
#include <unistd.h> /* For getpid */
#include <signal.h> /* Needed for sigset_t, includes this file */
#include <time.h> /* Needed for struct timespec */
#include <semaphore.h> /* For sem_t and SEM_PRIO_* defines */
#ifdef CONFIG_PTHREAD_SPINLOCKS
/* The architecture specific spinlock.h header file must provide the
* following:
*
* SP_LOCKED - A definition of the locked state value (usually 1)
* SP_UNLOCKED - A definition of the unlocked state value (usually 0)
* spinlock_t - The type of a spinlock memory object.
*
* SP_LOCKED and SP_UNLOCKED must constants of type spinlock_t.
*/
# include <arch/spinlock.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Standard POSIX switches */
#ifndef _POSIX_THREADS
# define _POSIX_THREADS
#endif
#ifndef _POSIX_THREAD_ATTR_STACKSIZE
# define _POSIX_THREAD_ATTR_STACKSIZE
#endif
/* Values for the process shared (pshared) attribute */
#define PTHREAD_PROCESS_PRIVATE 0
#define PTHREAD_PROCESS_SHARED 1
/* Values for the mutext type attribute:
*
* PTHREAD_MUTEX_NORMAL: This type of mutex does not detect deadlock.
* A thread attempting to relock this mutex without first unlocking
* it will deadlock. Attempting to unlock a mutex locked by a different
* thread results in undefined behavior. Attempting to unlock an unlocked
* mutex results in undefined behavior.
* PTHREAD_MUTEX_ERRORCHECK
* This type of mutex provides error checking. A thread attempting
* to relock this mutex without first unlocking it will return with
* an error. A thread attempting to unlock a mutex which another thread
* has locked will return with an error. A thread attempting to unlock
* an unlocked mutex will return with an error.
* PTHREAD_MUTEX_RECURSIVE
* A thread attempting to relock this mutex without first unlocking it will
* succeed in locking the mutex. The relocking deadlock which can occur
* with mutexes of type PTHREAD_MUTEX_NORMAL cannot occur with this type
* of mutex. Multiple locks of this mutex require the same number
* of unlocks to release the mutex before another thread can acquire
* the mutex. A thread attempting to unlock a mutex which another thread
* has locked will return with an error. A thread attempting to unlock
* an unlocked mutex will return with an error.
* PTHREAD_MUTEX_DEFAULT
* An implementation is allowed to map this mutex to one of the other mutex
* types.
*/
#define PTHREAD_MUTEX_NORMAL 0
#define PTHREAD_MUTEX_ERRORCHECK 1
#define PTHREAD_MUTEX_RECURSIVE 2
#define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
/* Valid ranges for the pthread stacksize attribute */
#define PTHREAD_STACK_MIN CONFIG_PTHREAD_STACK_MIN
#define PTHREAD_STACK_DEFAULT CONFIG_PTHREAD_STACK_DEFAULT
/* Values for the pthread inheritsched attribute */
#define PTHREAD_INHERIT_SCHED 0
#define PTHREAD_EXPLICIT_SCHED 1
/* Detach state */
#define PTHREAD_CREATE_JOINABLE 0
#define PTHREAD_CREATE_DETACHED 1
/* Default priority */
#define PTHREAD_DEFAULT_PRIORITY SCHED_PRIORITY_DEFAULT
/* Cancellation states used by pthread_setcancelstate() */
#define PTHREAD_CANCEL_ENABLE (0)
#define PTHREAD_CANCEL_DISABLE (1)
/* Cancellation types used by pthread_setcanceltype() */
#define PTHREAD_CANCEL_DEFERRED (0)
#define PTHREAD_CANCEL_ASYNCHRONOUS (1)
/* Thread return value when a pthread is canceled */
#define PTHREAD_CANCELED ((FAR void*)ERROR)
/* Used to initialize a pthread_once_t */
#define PTHREAD_ONCE_INIT {false, PTHREAD_MUTEX_INITIALIZER}
/* This is returned by pthread_barrier_wait. It must not match any errno
* in errno.h
*/
#define PTHREAD_BARRIER_SERIAL_THREAD 0x1000
/* Values for protocol mutex attribute */
#define PTHREAD_PRIO_NONE SEM_PRIO_NONE
#define PTHREAD_PRIO_INHERIT SEM_PRIO_INHERIT
#define PTHREAD_PRIO_PROTECT SEM_PRIO_PROTECT
/* Values for robust argument of pthread_mutexattr_get/setrobust
*
* PTHREAD_MUTEX_STALLED - No special actions are taken if the owner of the
* mutex is terminated while holding the mutex lock. This can lead to
* deadlocks if no other thread can unlock the mutex. This is the standard
* default value (NuttX permits you to override that default behavior
* with a configuration option).
*
* PTHREAD_MUTEX_ROBUST - If the process containing the owning thread of a
* robust mutex terminates while holding the mutex lock, the next thread
* that acquires the mutex will be notified about the termination by the
* return value EOWNERDEAD from the locking function. If the owning thread
* of a robust mutex terminates while holding the mutex lock, the next
* thread that attempts to acquire the mutex may be notified about the
* termination by the return value EOWNERDEAD. The notified thread can
* then attempt to make the state protected by the mutex consistent again,
* and if successful can mark the mutex state as consistent by calling
* pthread_mutex_consistent(). After a subsequent successful call to
* pthread_mutex_unlock(), the mutex lock will be released and can be used
* normally by other threads. If the mutex is unlocked without a call to
* pthread_mutex_consistent(), it will be in a permanently unusable state
* and all attempts to lock the mutex will fail with the error
* ENOTRECOVERABLE. The only permissible operation on such a mutex is
* pthread_mutex_destroy().
*/
#define PTHREAD_MUTEX_STALLED 0
#define PTHREAD_MUTEX_ROBUST 1
/* Values for struct pthread_mutex_s flags. These are non-standard and
* intended only for internal use within the OS.
*/
#define _PTHREAD_MFLAGS_ROBUST (1 << 0) /* Robust (NORMAL) mutex */
#define _PTHREAD_MFLAGS_INCONSISTENT (1 << 1) /* Mutex is in an inconsistent state */
#define _PTHREAD_MFLAGS_NRECOVERABLE (1 << 2) /* Inconsistent mutex has been unlocked */
/* The contention scope attribute in thread attributes object */
#define PTHREAD_SCOPE_SYSTEM 0
#define PTHREAD_SCOPE_PROCESS 1
/****************************************************************************
* Public Type Definitions
****************************************************************************/
#ifdef __cplusplus
extern "C"
{
#endif
/* pthread-specific types */
#ifndef __PTHREAD_KEY_T_DEFINED
typedef int pthread_key_t;
# define __PTHREAD_KEY_T_DEFINED 1
#endif
#ifndef __PTHREAD_ADDR_T_DEFINED
typedef FAR void *pthread_addr_t;
# define __PTHREAD_ADDR_T_DEFINED 1
#endif
typedef CODE pthread_addr_t (*pthread_startroutine_t)(pthread_addr_t);
typedef pthread_startroutine_t pthread_func_t;
typedef void (*pthread_trampoline_t)(pthread_startroutine_t, pthread_addr_t);
struct pthread_attr_s
{
uint8_t priority; /* Priority of the pthread */
uint8_t policy; /* Pthread scheduler policy */
uint8_t inheritsched; /* Inherit parent priority/policy? */
uint8_t detachstate; /* Initialize to the detach state */
#ifdef CONFIG_SCHED_SPORADIC
uint8_t low_priority; /* Low scheduling priority */
uint8_t max_repl; /* Maximum pending replenishments */
#endif
#ifdef CONFIG_SMP
cpu_set_t affinity; /* Set of permitted CPUs for the thread */
#endif
FAR void *stackaddr; /* Address of memory to be used as stack */
size_t stacksize; /* Size of the stack allocated for the pthread */
#ifdef CONFIG_SCHED_SPORADIC
struct timespec repl_period; /* Replenishment period */
struct timespec budget; /* Initial budget */
#endif
};
#ifndef __PTHREAD_ATTR_T_DEFINED
typedef struct pthread_attr_s pthread_attr_t;
# define __PTHREAD_ATTR_T_DEFINED 1
#endif
#ifndef __PTHREAD_T_DEFINED
typedef pid_t pthread_t;
# define __PTHREAD_T_DEFINED 1
#endif
struct pthread_condattr_s
{
int pshared;
clockid_t clockid;
};
#ifndef __PTHREAD_CONDATTR_T_DEFINED
typedef struct pthread_condattr_s pthread_condattr_t;
# define __PTHREAD_CONDATTR_T_DEFINED 1
#endif
struct pthread_cond_s
{
sem_t sem;
clockid_t clockid;
};
#ifndef __PTHREAD_COND_T_DEFINED
typedef struct pthread_cond_s pthread_cond_t;
# define __PTHREAD_COND_T_DEFINED 1
#endif
#define PTHREAD_COND_INITIALIZER {SEM_INITIALIZER(0), CLOCK_REALTIME }
struct pthread_mutexattr_s
{
uint8_t pshared : 1; /* PTHREAD_PROCESS_PRIVATE or PTHREAD_PROCESS_SHARED */
#ifdef CONFIG_PRIORITY_INHERITANCE
uint8_t proto : 2; /* See PTHREAD_PRIO_* definitions */
#endif
#ifdef CONFIG_PTHREAD_MUTEX_TYPES
uint8_t type : 2; /* Type of the mutex. See PTHREAD_MUTEX_* definitions */
#endif
#ifdef CONFIG_PTHREAD_MUTEX_BOTH
uint8_t robust : 1; /* PTHREAD_MUTEX_STALLED or PTHREAD_MUTEX_ROBUST */
#endif
};
#ifndef __PTHREAD_MUTEXATTR_T_DEFINED
typedef struct pthread_mutexattr_s pthread_mutexattr_t;
# define __PTHREAD_MUTEXATTR_T_DEFINED 1
#endif
struct pthread_mutex_s
{
#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
/* Supports a singly linked list */
FAR struct pthread_mutex_s *flink;
#endif
/* Payload */
sem_t sem; /* Semaphore underlying the implementation of the mutex */
pid_t pid; /* ID of the holder of the mutex */
#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
uint8_t flags; /* See _PTHREAD_MFLAGS_* */
#endif
#ifdef CONFIG_PTHREAD_MUTEX_TYPES
uint8_t type; /* Type of the mutex. See PTHREAD_MUTEX_* definitions */
int16_t nlocks; /* The number of recursive locks held */
#endif
};
#ifndef __PTHREAD_MUTEX_T_DEFINED
typedef struct pthread_mutex_s pthread_mutex_t;
# define __PTHREAD_MUTEX_T_DEFINED 1
#endif
#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
# ifdef CONFIG_PTHREAD_MUTEX_DEFAULT_UNSAFE
# define __PTHREAD_MUTEX_DEFAULT_FLAGS 0
# else
# define __PTHREAD_MUTEX_DEFAULT_FLAGS _PTHREAD_MFLAGS_ROBUST
# endif
#endif
#if defined(CONFIG_PTHREAD_MUTEX_TYPES) && !defined(CONFIG_PTHREAD_MUTEX_UNSAFE)
# define PTHREAD_MUTEX_INITIALIZER {NULL, SEM_INITIALIZER(1), -1, \
__PTHREAD_MUTEX_DEFAULT_FLAGS, \
PTHREAD_MUTEX_DEFAULT, 0}
# define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
{NULL, SEM_INITIALIZER(1), -1, \
__PTHREAD_MUTEX_DEFAULT_FLAGS, \
PTHREAD_MUTEX_RECURSIVE, 0}
#elif defined(CONFIG_PTHREAD_MUTEX_TYPES)
# define PTHREAD_MUTEX_INITIALIZER {SEM_INITIALIZER(1), -1, \
PTHREAD_MUTEX_DEFAULT, 0}
# define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
{SEM_INITIALIZER(1), -1, \
PTHREAD_MUTEX_RECURSIVE, 0}
#elif !defined(CONFIG_PTHREAD_MUTEX_UNSAFE)
# define PTHREAD_MUTEX_INITIALIZER {NULL, SEM_INITIALIZER(1), -1,\
__PTHREAD_MUTEX_DEFAULT_FLAGS}
#else
# define PTHREAD_MUTEX_INITIALIZER {SEM_INITIALIZER(1), -1}
#endif
struct pthread_barrierattr_s
{
int pshared;
};
#ifndef __PTHREAD_BARRIERATTR_T_DEFINED
typedef struct pthread_barrierattr_s pthread_barrierattr_t;
# define __PTHREAD_BARRIERATTR_T_DEFINED 1
#endif
struct pthread_barrier_s
{
sem_t sem;
unsigned int count;
};
#ifndef __PTHREAD_BARRIER_T_DEFINED
typedef struct pthread_barrier_s pthread_barrier_t;
# define __PTHREAD_BARRIER_T_DEFINED 1
#endif
struct pthread_once_s
{
bool done;
pthread_mutex_t mutex;
};
#ifndef __PTHREAD_ONCE_T_DEFINED
typedef struct pthread_once_s pthread_once_t;
# define __PTHREAD_ONCE_T_DEFINED 1
#endif
struct pthread_rwlockattr_s
{
int pshared;
};
#ifndef __PTHREAD_RWLOCKATTR_T_DEFINED
typedef struct pthread_rwlockattr_s pthread_rwlockattr_t;
# define __PTHREAD_RWLOCKATTR_T_DEFINED 1
#endif
struct pthread_rwlock_s
{
pthread_mutex_t lock;
pthread_cond_t cv;
unsigned int num_readers;
unsigned int num_writers;
bool write_in_progress;
};
#ifndef __PTHREAD_RWLOCK_T_DEFINED
typedef struct pthread_rwlock_s pthread_rwlock_t;
# define __PTHREAD_RWLOCK_T_DEFINED 1
#endif
#define PTHREAD_RWLOCK_INITIALIZER {PTHREAD_MUTEX_INITIALIZER, \
PTHREAD_COND_INITIALIZER, \
0, 0, false}
#ifdef CONFIG_PTHREAD_SPINLOCKS
/* This (non-standard) structure represents a pthread spinlock */
struct pthread_spinlock_s
{
volatile spinlock_t sp_lock; /* Indicates if the spinlock is locked or
* not. See the values SP_LOCKED and
* SP_UNLOCKED. */
pthread_t sp_holder; /* ID of the thread that holds the spinlock */
};
# ifndef __PTHREAD_SPINLOCK_T_DEFINED
/* It is referenced via this standard type */
typedef FAR struct pthread_spinlock_s pthread_spinlock_t;
# define __PTHREAD_SPINLOCK_T_DEFINED 1
# endif
#endif /* CONFIG_PTHREAD_SPINLOCKS */
#if defined(CONFIG_PTHREAD_CLEANUP_STACKSIZE) && CONFIG_PTHREAD_CLEANUP_STACKSIZE > 0
/* This type describes the pthread cleanup callback (non-standard) */
typedef CODE void (*pthread_cleanup_t)(FAR void *arg);
#endif
/* Forward references */
struct sched_param; /* Defined in sched.h */
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* Initializes a thread attributes object (attr) with default values
* for all of the individual attributes used by a given implementation.
*/
int pthread_attr_init(FAR pthread_attr_t *attr);
/* An attributes object can be deleted when it is no longer needed. */
int pthread_attr_destroy(FAR pthread_attr_t *attr);
/* Set or obtain the default scheduling algorithm */
int pthread_attr_setschedpolicy(FAR pthread_attr_t *attr, int policy);
int pthread_attr_getschedpolicy(FAR const pthread_attr_t *attr,
FAR int *policy);
int pthread_attr_setschedparam(FAR pthread_attr_t *attr,
FAR const struct sched_param *param);
int pthread_attr_getschedparam(FAR const pthread_attr_t *attr,
FAR struct sched_param *param);
int pthread_attr_setinheritsched(FAR pthread_attr_t *attr,
int inheritsched);
int pthread_attr_getinheritsched(FAR const pthread_attr_t *attr,
FAR int *inheritsched);
int pthread_attr_getdetachstate(FAR const pthread_attr_t *attr,
FAR int *detachstate);
int pthread_attr_setdetachstate(FAR pthread_attr_t *attr,
int detachstate);
#ifdef CONFIG_SMP
/* Set or obtain thread affinity attributes */
int pthread_attr_setaffinity_np(FAR pthread_attr_t *attr,
size_t cpusetsize,
FAR const cpu_set_t *cpuset);
int pthread_attr_getaffinity_np(FAR const pthread_attr_t *attr,
size_t cpusetsize, cpu_set_t *cpuset);
#endif
/* Set or obtain the default stack size */
int pthread_attr_setstackaddr(FAR pthread_attr_t *attr, FAR void *stackaddr);
int pthread_attr_getstackaddr(FAR const pthread_attr_t *attr,
FAR void **stackaddr);
/* Set or obtain the default stack size */
int pthread_attr_setstacksize(FAR pthread_attr_t *attr, size_t stacksize);
int pthread_attr_getstacksize(FAR const pthread_attr_t *attr,
FAR size_t *stacksize);
/* Set or obtain stack address and size attributes */
int pthread_attr_setstack(FAR pthread_attr_t *attr,
FAR void *stackaddr, size_t stacksize);
int pthread_attr_getstack(FAR const pthread_attr_t *attr,
FAR void **stackaddr, FAR size_t *stacksize);
/* Set/get contention scope attribute in thread attributes object */
int pthread_attr_setscope(FAR pthread_attr_t *attr, int scope);
int pthread_attr_getscope(FAR const pthread_attr_t *attr, FAR int *scope);
/* Set or get the name of a thread */
int pthread_setname_np(pthread_t thread, FAR const char *name);
int pthread_getname_np(pthread_t thread, FAR char *name, size_t len);
/* Get run-time stack address and size */
FAR void *pthread_get_stackaddr_np(pthread_t thread);
ssize_t pthread_get_stacksize_np(pthread_t thread);
/* To create a thread object and runnable thread, a routine must be specified
* as the new thread's start routine. An argument may be passed to this
* routine, as an untyped address; an untyped address may also be returned as
* the routine's value. An attributes object may be used to specify details
* about the kind of thread being created.
*/
int pthread_create(FAR pthread_t *thread, FAR const pthread_attr_t *attr,
pthread_startroutine_t startroutine, pthread_addr_t arg);
/* A thread object may be "detached" to specify that the return value and
* completion status will not be requested.
*/
int pthread_detach(pthread_t thread);
/* A thread may terminate it's own execution or the execution of another
* thread.
*/
void pthread_exit(pthread_addr_t value) noreturn_function;
int pthread_cancel(pthread_t thread);
int pthread_setcancelstate(int state, FAR int *oldstate);
int pthread_setcanceltype(int type, FAR int *oldtype);
void pthread_testcancel(void);
/* A thread may set up cleanup functions to execute when the thread exits or
* is canceled.
*/
#if defined(CONFIG_PTHREAD_CLEANUP_STACKSIZE) && CONFIG_PTHREAD_CLEANUP_STACKSIZE > 0
void pthread_cleanup_pop(int execute);
void pthread_cleanup_push(pthread_cleanup_t routine, FAR void *arg);
#endif
/* A thread can await termination of another thread and retrieve the return
* value of the thread.
*/
int pthread_join(pthread_t thread, FAR pthread_addr_t *value);
/* A thread may tell the scheduler that its processor
* can be made available.
*/
void pthread_yield(void);
/* A thread may obtain a copy of its own thread handle. */
pthread_t pthread_self(void);
pid_t pthread_gettid_np(pthread_t thread);
/* Compare two thread IDs. */
#define pthread_equal(t1,t2) ((t1) == (t2))
/* Thread scheduling parameters */
int pthread_getschedparam(pthread_t thread, FAR int *policy,
FAR struct sched_param *param);
int pthread_setschedparam(pthread_t thread, int policy,
FAR const struct sched_param *param);
int pthread_setschedprio(pthread_t thread, int prio);
#ifdef CONFIG_SMP
/* Thread affinity */
int pthread_setaffinity_np(pthread_t thread, size_t cpusetsize,
FAR const cpu_set_t *cpuset);
int pthread_getaffinity_np(pthread_t thread, size_t cpusetsize,
FAR cpu_set_t *cpuset);
#endif
/* Thread-specific Data Interfaces */
int pthread_key_create(FAR pthread_key_t *key,
CODE void (*destructor)(FAR void *));
int pthread_setspecific(pthread_key_t key, FAR const void *value);
FAR void *pthread_getspecific(pthread_key_t key);
int pthread_key_delete(pthread_key_t key);
/* Create, operate on, and destroy mutex attributes. */
int pthread_mutexattr_init(FAR pthread_mutexattr_t *attr);
int pthread_mutexattr_destroy(FAR pthread_mutexattr_t *attr);
int pthread_mutexattr_getpshared(FAR const pthread_mutexattr_t *attr,
FAR int *pshared);
int pthread_mutexattr_setpshared(FAR pthread_mutexattr_t *attr,
int pshared);
int pthread_mutexattr_gettype(FAR const pthread_mutexattr_t *attr,
FAR int *type);
int pthread_mutexattr_settype(FAR pthread_mutexattr_t *attr, int type);
int pthread_mutexattr_getprotocol(FAR const pthread_mutexattr_t *attr,
FAR int *protocol);
int pthread_mutexattr_setprotocol(FAR pthread_mutexattr_t *attr,
int protocol);
int pthread_mutexattr_getrobust(FAR const pthread_mutexattr_t *attr,
FAR int *robust);
int pthread_mutexattr_setrobust(FAR pthread_mutexattr_t *attr,
int robust);
/* The following routines create, delete, lock and unlock mutexes. */
int pthread_mutex_init(FAR pthread_mutex_t *mutex,
FAR const pthread_mutexattr_t *attr);
int pthread_mutex_destroy(FAR pthread_mutex_t *mutex);
int pthread_mutex_lock(FAR pthread_mutex_t *mutex);
int pthread_mutex_timedlock(FAR pthread_mutex_t *mutex,
FAR const struct timespec *abs_timeout);
int pthread_mutex_trylock(FAR pthread_mutex_t *mutex);
int pthread_mutex_unlock(FAR pthread_mutex_t *mutex);
#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
/* Make sure that the pthread mutex is in a consistent state */
int pthread_mutex_consistent(FAR pthread_mutex_t *mutex);
#endif
/* Operations on condition variables */
int pthread_condattr_init(FAR pthread_condattr_t *attr);
int pthread_condattr_destroy(FAR pthread_condattr_t *attr);
int pthread_condattr_getpshared(FAR const pthread_condattr_t *attr,
FAR int *pshared);
int pthread_condattr_setpshared(FAR pthread_condattr_t *attr, int pshared);
int pthread_condattr_getclock(FAR const pthread_condattr_t *attr,
clockid_t *clock_id);
int pthread_condattr_setclock(FAR pthread_condattr_t *attr,
clockid_t clock_id);
/* A thread can create and delete condition variables. */
int pthread_cond_init(FAR pthread_cond_t *cond,
FAR const pthread_condattr_t *attr);
int pthread_cond_destroy(FAR pthread_cond_t *cond);
/* A thread can signal to and broadcast on a condition variable. */
int pthread_cond_broadcast(FAR pthread_cond_t *cond);
int pthread_cond_signal(FAR pthread_cond_t *cond);
/* A thread can wait for a condition variable to be signalled or broadcast. */
int pthread_cond_wait(FAR pthread_cond_t *cond, FAR pthread_mutex_t *mutex);
/* A thread can perform a timed wait on a condition variable. */
int pthread_cond_timedwait(FAR pthread_cond_t *cond,
FAR pthread_mutex_t *mutex,
FAR const struct timespec *abstime);
int pthread_cond_clockwait(FAR pthread_cond_t *cond,
FAR pthread_mutex_t *mutex,
clockid_t clockid,
FAR const struct timespec *abstime);
/* Barrier attributes */
int pthread_barrierattr_destroy(FAR pthread_barrierattr_t *attr);
int pthread_barrierattr_init(FAR pthread_barrierattr_t *attr);
int pthread_barrierattr_getpshared(FAR const pthread_barrierattr_t *attr,
FAR int *pshared);
int pthread_barrierattr_setpshared(FAR pthread_barrierattr_t *attr,
int pshared);
/* Barriers */
int pthread_barrier_destroy(FAR pthread_barrier_t *barrier);
int pthread_barrier_init(FAR pthread_barrier_t *barrier,
FAR const pthread_barrierattr_t *attr,
unsigned int count);
int pthread_barrier_wait(FAR pthread_barrier_t *barrier);
/* Pthread initialization */
int pthread_once(FAR pthread_once_t *once_control,
CODE void (*init_routine)(void));
/* Pthread rwlock attributes */
int pthread_rwlockattr_init(FAR pthread_rwlockattr_t *attr);
int pthread_rwlockattr_destroy(FAR pthread_rwlockattr_t *attr);
int pthread_rwlockattr_getpshared(FAR const pthread_rwlockattr_t *attr,
FAR int *pshared);
int pthread_rwlockattr_setpshared(FAR pthread_rwlockattr_t *attr,
int pshared);
/* Pthread rwlock */
int pthread_rwlock_destroy(FAR pthread_rwlock_t *rw_lock);
int pthread_rwlock_init(FAR pthread_rwlock_t *rw_lock,
FAR const pthread_rwlockattr_t *attr);
int pthread_rwlock_rdlock(pthread_rwlock_t *lock);
int pthread_rwlock_timedrdlock(FAR pthread_rwlock_t *lock,
FAR const struct timespec *abstime);
int pthread_rwlock_clockrdlock(FAR pthread_rwlock_t *lock,
clockid_t clockid,
FAR const struct timespec *abstime);
int pthread_rwlock_tryrdlock(FAR pthread_rwlock_t *lock);
int pthread_rwlock_wrlock(FAR pthread_rwlock_t *lock);
int pthread_rwlock_timedwrlock(FAR pthread_rwlock_t *lock,
FAR const struct timespec *abstime);
int pthread_rwlock_clockwrlock(FAR pthread_rwlock_t *lock,
clockid_t clockid,
FAR const struct timespec *abstime);
int pthread_rwlock_trywrlock(FAR pthread_rwlock_t *lock);
int pthread_rwlock_unlock(FAR pthread_rwlock_t *lock);
/* Pthread signal management APIs */
int pthread_kill(pthread_t thread, int sig);
int pthread_sigmask(int how, FAR const sigset_t *set, FAR sigset_t *oset);
#ifdef CONFIG_PTHREAD_SPINLOCKS
/* Pthread spinlocks */
int pthread_spin_init(FAR pthread_spinlock_t *lock, int pshared);
int pthread_spin_destroy(FAR pthread_spinlock_t *lock);
int pthread_spin_lock(FAR pthread_spinlock_t *lock);
int pthread_spin_trylock(FAR pthread_spinlock_t *lock);
int pthread_spin_unlock(FAR pthread_spinlock_t *lock);
#endif
int pthread_getcpuclockid(pthread_t thread_id, FAR clockid_t *clock_id);
int pthread_atfork(CODE void (*prepare)(void),
CODE void (*parent)(void),
CODE void (*child)(void));
#ifdef __cplusplus
}
#endif
/****************************************************************************
* Minimal Type Definitions
****************************************************************************/
#else /* __INCLUDE_PTHREAD_H */
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <stdbool.h>
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* Avoid circular dependencies by assuring that simple type definitions are
* available in any inclusion ordering.
*/
#ifndef __PTHREAD_KEY_T_DEFINED
typedef int pthread_key_t;
# define __PTHREAD_KEY_T_DEFINED 1
#endif
#ifndef __PTHREAD_ADDR_T_DEFINED
typedef FAR void *pthread_addr_t;
# define __PTHREAD_ADDR_T_DEFINED 1
#endif
#ifndef __PTHREAD_ATTR_T_DEFINED
struct pthread_attr_s;
typedef struct pthread_attr_s pthread_attr_t;
# define __PTHREAD_ATTR_T_DEFINED 1
#endif
#ifndef __PTHREAD_T_DEFINED
typedef pid_t pthread_t;
# define __PTHREAD_T_DEFINED 1
#endif
#ifndef __PTHREAD_CONDATTR_T_DEFINED
typedef struct pthread_condattr_s pthread_condattr_t;
# define __PTHREAD_CONDATTR_T_DEFINED 1
#endif
#ifndef __PTHREAD_COND_T_DEFINED
struct pthread_cond_s;
typedef struct pthread_cond_s pthread_cond_t;
# define __PTHREAD_COND_T_DEFINED 1
#endif
#ifndef __PTHREAD_MUTEXATTR_T_DEFINED
struct pthread_mutexattr_s;
typedef struct pthread_mutexattr_s pthread_mutexattr_t;
# define __PTHREAD_MUTEXATTR_T_DEFINED 1
#endif
#ifndef __PTHREAD_MUTEX_T_DEFINED
struct pthread_mutex_s;
typedef struct pthread_mutex_s pthread_mutex_t;
# define __PTHREAD_MUTEX_T_DEFINED 1
#endif
#ifndef __PTHREAD_BARRIERATTR_T_DEFINED
struct pthread_barrierattr_s;
typedef struct pthread_barrierattr_s pthread_barrierattr_t;
# define __PTHREAD_BARRIERATTR_T_DEFINED 1
#endif
#ifndef __PTHREAD_BARRIER_T_DEFINED
struct pthread_barrier_s;
typedef struct pthread_barrier_s pthread_barrier_t;
# define __PTHREAD_BARRIER_T_DEFINED 1
#endif
#ifndef __PTHREAD_RWLOCKATTR_T_DEFINED
struct pthread_rwlockattr_s;
typedef struct pthread_rwlockattr_s pthread_rwlockattr_t;
# define __PTHREAD_RWLOCKATTR_T_DEFINED 1
#endif
#ifndef __PTHREAD_RWLOCK_T_DEFINED
struct pthread_rwlock_s;
typedef struct pthread_rwlock_s pthread_rwlock_t;
# define __PTHREAD_RWLOCK_T_DEFINED 1
#endif
#ifdef CONFIG_PTHREAD_SPINLOCKS
# ifndef __PTHREAD_SPINLOCK_T_DEFINED
struct pthread_spinlock_s;
typedef FAR struct pthread_spinlock_s pthread_spinlock_t;
# define __PTHREAD_SPINLOCK_T_DEFINED 1
# endif
#endif /* CONFIG_PTHREAD_SPINLOCKS */
#ifndef __PTHREAD_ONCE_T_DEFINED
struct pthread_once_s;
typedef struct pthread_once_s pthread_once_t;
# define __PTHREAD_ONCE_T_DEFINED 1
#endif
#endif /* __INCLUDE_PTHREAD_H */
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