/* Copyright 2016 Google Inc.

  Licensed 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 NSYNC_PLATFORM_WIN32_PLATFORM_H_
#define NSYNC_PLATFORM_WIN32_PLATFORM_H_

#include <Windows.h>
#include <time.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/timeb.h>

#include "compiler.h"
#include "nsync_cpp.h"

extern int write (int, const char *, size_t);

/* Avoid deprecation/safety warning for tmpfile() */
#define tmpfile nsync_tmpfile_wrapper
static inline FILE *nsync_tmpfile_wrapper (void) {
	FILE *fp;
	if (tmpfile_s (&fp) != 0) {
		fp = NULL;
	}
	return (fp);
}

NSYNC_C_START_
/* Can't use TlsAlloc() because we use pthread_key_create's destructor
   argument, so we implement it anew. */
#define pthread_key_t nsync_pthread_key_t
typedef int nsync_pthread_key_t;
int nsync_pthread_key_create (nsync_pthread_key_t *pkey, void (*dest) (void *));
int nsync_pthread_key_delete (nsync_pthread_key_t key);
void *nsync_pthread_getspecific (nsync_pthread_key_t key);
int nsync_pthread_setspecific (nsync_pthread_key_t key, void *value);
#define pthread_key_create nsync_pthread_key_create
#define pthread_key_delete nsync_pthread_key_delete
#define pthread_getspecific nsync_pthread_getspecific
#define pthread_setspecific nsync_pthread_setspecific
NSYNC_C_END_

NSYNC_CPP_START_

#define CLOCK_REALTIME 0
#define TIMER_ABSTIME 1
#define clockid_t nsync_clockid_t
typedef int nsync_clockid_t;
int nsync_clock_gettime (clockid_t clk_id, struct timespec *tp);
#define clock_gettime nsync_clock_gettime
int nsync_nanosleep(const struct timespec *delay, struct timespec *remaining);
#define nanosleep nsync_nanosleep

#define pthread_mutex_t CRITICAL_SECTION
#define pthread_mutex_lock EnterCriticalSection
#define pthread_mutex_unlock LeaveCriticalSection
#define pthread_mutex_init(mu,attr) InitializeCriticalSection (mu)
#define pthread_mutex_destroy DeleteCriticalSection

#define pthread_cond_t CONDITION_VARIABLE
#define pthread_cond_broadcast WakeAllConditionVariable
#define pthread_cond_signal WakeConditionVariable
#define pthread_cond_wait(cv, mu) SleepConditionVariableCS ((cv), (mu), INFINITE)
#define pthread_cond_timedwait nsync_pthread_cond_timedwait
#define pthread_cond_init(cv, attr) InitializeConditionVariable (cv)
#define pthread_cond_destroy(cv) /*no-op*/
int nsync_pthread_cond_timedwait (pthread_cond_t *cv, pthread_mutex_t *mu,
		                  const struct timespec *abstimeout);

typedef struct {
	SRWLOCK srw;
	int w;
} nsync_pthread_rwlock_t;
#define pthread_rwlock_t nsync_pthread_rwlock_t
#define pthread_rwlock_wrlock(rw) do { AcquireSRWLockExclusive (&(rw)->srw); (rw)->w = 1; } while (0)
#define pthread_rwlock_rdlock(rw) AcquireSRWLockShared (&(rw)->srw)
#define pthread_rwlock_unlock(rw) do { if ((rw)->w) { (rw)->w = 0; ReleaseSRWLockExclusive (&(rw)->srw); } else { ReleaseSRWLockShared (&(rw)->srw); } } while (0)
#define pthread_rwlock_init(rw,attr) do { InitializeSRWLock (&(rw)->srw); (rw)->w = 0; } while (0) 
#define pthread_rwlock_destroy(rw) /*no-op*/


#define pthread_once_t INIT_ONCE
#define PTHREAD_ONCE_INIT INIT_ONCE_STATIC_INIT
extern BOOL CALLBACK nsync_init_callback_ (pthread_once_t *o, void *v, void **c);
#define pthread_once(o, f) do { \
				void (*ff) = (f); \
				InitOnceExecuteOnce ((o),  &nsync_init_callback_, &ff, NULL); \
			   } while (0)

#define sched_yield() Sleep(0)

NSYNC_CPP_END_

#endif /*NSYNC_PLATFORM_WIN32_PLATFORM_H_*/