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 /*****************************************************************************/
 // Copyright 2002-2019 Adobe Systems Incorporated
 // All Rights Reserved.
 //
 // NOTICE:  Adobe permits you to use, modify, and distribute this file in
 // accordance with the terms of the Adobe license agreement accompanying it.
 /*****************************************************************************/
 
 #ifndef __dng_pthread__
 #define __dng_pthread__
 
 /*****************************************************************************/
 
 #include "dng_flags.h"
 
 /*****************************************************************************/
 
 #if qDNGThreadSafe
 
 /*****************************************************************************/
 
 //#if !qWinOS
 #ifndef _MSC_VER
 
 /*****************************************************************************/
 
 /* Try generic POSIX compile */
 
 #include <errno.h>
 #include <pthread.h>
 
 #define dng_pthread_disassociate()
 #define dng_pthread_terminate()
 
 /*****************************************************************************/
 
 #else
 
 /*****************************************************************************/
 
 #include <stdlib.h>
 
 #if _MSC_VER >= 1600
 
 // Get this included so ETIMEDOUT is predefined.
 #include <errno.h>
 
 #endif
 
 #ifdef __cplusplus
 extern "C"
 {
 #endif
 
 /*****************************************************************************/
 
 #define DNG_ETIMEDOUT       60              /* Operation timed out */
 
 struct dng_timespec {
     long tv_sec;
     long tv_nsec;
 };
 
 
 typedef unsigned long dng_pthread_t;
 
 typedef struct dng_pthread_mutex_impl *dng_pthread_mutex_t;
 typedef struct dng_pthread_cond_impl *dng_pthread_cond_t;
 typedef unsigned long dng_pthread_key_t;
 
 
 #define DNG_PTHREAD_MUTEX_INITIALIZER ((struct dng_pthread_mutex_impl *)-1)
 #define DNG_PTHREAD_COND_INITIALIZER ((struct dng_pthread_cond_impl *)-1)
 
 struct _dng_pthread_once_t {
     int inited;
     long semaphore;
 };
 
 typedef struct _dng_pthread_once_t dng_pthread_once_t;
 #define DNG_PTHREAD_ONCE_INIT { 0, -1 }
 
 #define dng_pthread_equal(t1, t2) ((t1) == (t2))
 
 typedef struct dng_pthread_attr_impl *dng_pthread_attr_t;
 
 int dng_pthread_attr_init(dng_pthread_attr_t *attr);
 int dng_pthread_attr_destroy(dng_pthread_attr_t *attr);
 
 int dng_pthread_attr_setstacksize(dng_pthread_attr_t *attr, size_t stacksize);
 int dng_pthread_attr_getstacksize(const dng_pthread_attr_t *attr, size_t *stacksize);
 
 int dng_pthread_create(dng_pthread_t *thread, const dng_pthread_attr_t * /* attrs */, void * (*func)(void *), void *arg);
 int dng_pthread_detach(dng_pthread_t thread);
 int dng_pthread_join(dng_pthread_t thread, void **result);
 dng_pthread_t dng_pthread_self();
 void dng_pthread_exit(void *result);
 
 #define DNG_PTHREAD_MUTEX_RECURSIVE 0
 typedef unsigned long dng_pthread_mutexattr_t;
 
 int dng_pthread_mutexattr_init(dng_pthread_mutexattr_t *mutexattr);
 int dng_pthread_mutexattr_settype(dng_pthread_mutexattr_t *mutexattr, int /*the options*/);
 
 int dng_pthread_mutex_init(dng_pthread_mutex_t *mutex, void * /* attrs */);
 int dng_pthread_mutex_destroy(dng_pthread_mutex_t *mutex);
 int dng_pthread_mutex_lock(dng_pthread_mutex_t *mutex);
 int dng_pthread_mutex_unlock(dng_pthread_mutex_t *mutex);
 
 int dng_pthread_cond_init(dng_pthread_cond_t *cond, void * /* attrs */);
 int dng_pthread_cond_destroy(dng_pthread_cond_t *cond);
 int dng_pthread_cond_wait(dng_pthread_cond_t *cond, dng_pthread_mutex_t *mutex);
 int dng_pthread_cond_timedwait(dng_pthread_cond_t *cond, dng_pthread_mutex_t *mutex, struct dng_timespec *latest_time);
 int dng_pthread_cond_signal(dng_pthread_cond_t *cond);
 int dng_pthread_cond_broadcast(dng_pthread_cond_t *cond);
 
 int dng_pthread_once(dng_pthread_once_t *once, void (*init_func)());
 
 int dng_pthread_key_create(dng_pthread_key_t * key, void (*destructor) (void *));
 int dng_pthread_key_delete(dng_pthread_key_t key);
 int dng_pthread_setspecific(dng_pthread_key_t key, const void *value);
 void *dng_pthread_getspecific(dng_pthread_key_t key);
 
 typedef struct dng_pthread_rwlock_impl *dng_pthread_rwlock_t;
 typedef void *pthread_rwlockattr_t;
 
 int dng_pthread_rwlock_destroy(dng_pthread_rwlock_t * rwlock);
 int dng_pthread_rwlock_init(dng_pthread_rwlock_t * rwlock, const pthread_rwlockattr_t * attrs);
 int dng_pthread_rwlock_rdlock(dng_pthread_rwlock_t * rwlock);
 int dng_pthread_rwlock_tryrdlock(dng_pthread_rwlock_t * rwlock);
 int dng_pthread_rwlock_trywrlock(dng_pthread_rwlock_t * rwlock);
 int dng_pthread_rwlock_unlock(dng_pthread_rwlock_t * rwlock);
 int dng_pthread_rwlock_wrlock(dng_pthread_rwlock_t * rwlock);
 
 // dng_pthread may maintain per-thread global state. This routine frees that global state.
 // there is no need to call this for threads created by dng_pthread and one can call
 // dng_pthread routines of a thread after dng_pthread_disassociate as the global state will
 // be recreated as necessary. However dng_pthread_disassociate will need to be called again
 // and there is a slight performance cost. Do not call this routine while holding a mutex, etc.
 void dng_pthread_disassociate();
 
 void dng_pthread_terminate();
 
 /*****************************************************************************/
 
 // Map symbols back to plain pthread names. This whole mechanism is so the DNG pthreads library
 // symbols do not collide with another pthread emulation library
 // that may be in use in the same linked entity. However if that is the case, it would be far better
 // to have the DNG code use the same pthread library as the rest of the code.
 
 #define pthread_t dng_pthread_t
 #define pthread_mutex_t dng_pthread_mutex_t
 #define pthread_cond_t dng_pthread_cond_t
 #define pthread_once_t dng_pthread_once_t
 #define pthread_key_t dng_pthread_key_t
 
 #undef PTHREAD_MUTEX_INITIALIZER
 #define PTHREAD_MUTEX_INITIALIZER DNG_PTHREAD_MUTEX_INITIALIZER
 #undef PTHREAD_COND_INITIALIZER
 #define PTHREAD_COND_INITIALIZER DNG_PTHREAD_COND_INITIALIZER
 
 #undef PTHREAD_ONCE_INIT
 #define PTHREAD_ONCE_INIT DNG_PTHREAD_ONCE_INIT
 
 #if _MSC_VER < 1900
 #define timespec dng_timespec
 #endif
 
 /* If it is defined on Windows, it probably has the wrong value... */
 #if defined(WIN32) || !defined(ETIMEDOUT)
 #undef ETIMEDOUT
 #define ETIMEDOUT DNG_ETIMEDOUT
 #endif
 
 #define pthread_equal dng_pthread_equal
 
 #define pthread_attr_t dng_pthread_attr_t
 
 #define pthread_attr_init dng_pthread_attr_init
 #define pthread_attr_destroy dng_pthread_attr_destroy
 
 #define pthread_attr_setstacksize dng_pthread_attr_setstacksize
 #define pthread_attr_getstacksize dng_pthread_attr_getstacksize
 
 #define pthread_create dng_pthread_create
 #define pthread_detach dng_pthread_detach
 #define pthread_join dng_pthread_join
 #define pthread_self dng_pthread_self
 #define pthread_exit dng_pthread_exit
 
 #define pthread_mutex_init dng_pthread_mutex_init
 #define pthread_mutex_destroy dng_pthread_mutex_destroy
 #define pthread_mutex_lock dng_pthread_mutex_lock
 #define pthread_mutex_unlock dng_pthread_mutex_unlock
 
 #define pthread_cond_init dng_pthread_cond_init
 #define pthread_cond_destroy dng_pthread_cond_destroy
 #define pthread_cond_wait dng_pthread_cond_wait
 #define pthread_cond_timedwait dng_pthread_cond_timedwait
 #define pthread_cond_signal dng_pthread_cond_signal
 #define pthread_cond_broadcast dng_pthread_cond_broadcast
 
 #define pthread_once dng_pthread_once
 
 #define pthread_key_create dng_pthread_key_create
 #define pthread_key_delete dng_pthread_key_delete
 #define pthread_setspecific dng_pthread_setspecific
 #define pthread_getspecific dng_pthread_getspecific
 
 #define pthread_rwlock_t dng_pthread_rwlock_t
 
 #define pthread_rwlock_destroy dng_pthread_rwlock_destroy
 #define pthread_rwlock_init dng_pthread_rwlock_init
 #define pthread_rwlock_rdlock dng_pthread_rwlock_rdlock
 #define pthread_rwlock_tryrdlock dng_pthread_rwlock_tryrdlock
 #define pthread_rwlock_trywrlock dng_pthread_rwlock_trywrlock
 #define pthread_rwlock_unlock dng_pthread_rwlock_unlock
 #define pthread_rwlock_wrlock dng_pthread_rwlock_wrlock
 
 /*****************************************************************************/
 
 #ifdef __cplusplus
 }
 #endif
 
 /*****************************************************************************/
 
 #endif
 
 /*****************************************************************************/
 
 #ifdef __cplusplus
 extern "C"
 {
 #endif
 
 int dng_pthread_now (struct timespec *now);
 
 #ifdef __cplusplus
 }
 #endif
 
 /*****************************************************************************/
 
 #endif // qDNGThreadSafe
 
 /*****************************************************************************/
 
 #endif
 
 /*****************************************************************************/