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#ifndef AWS_COMMON_MUTEX_H
#define AWS_COMMON_MUTEX_H
/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/common/common.h>
#ifdef _WIN32
/* NOTE: Do not use this macro before including windows.h */
# define AWSMUTEX_TO_WINDOWS(pMutex) (PSRWLOCK) & (pMutex)->mutex_handle
#else
# include <pthread.h>
#endif
AWS_PUSH_SANE_WARNING_LEVEL
struct aws_mutex {
#ifdef _WIN32
void *mutex_handle;
#else
pthread_mutex_t mutex_handle;
#endif
bool initialized;
};
#ifdef _WIN32
# define AWS_MUTEX_INIT \
{ .mutex_handle = NULL, .initialized = true }
#else
# define AWS_MUTEX_INIT \
{ .mutex_handle = PTHREAD_MUTEX_INITIALIZER, .initialized = true }
#endif
AWS_EXTERN_C_BEGIN
/**
* Initializes a new platform instance of mutex.
*/
AWS_COMMON_API
int aws_mutex_init(struct aws_mutex *mutex);
/**
* Cleans up internal resources.
*/
AWS_COMMON_API
void aws_mutex_clean_up(struct aws_mutex *mutex);
/**
* Blocks until it acquires the lock. While on some platforms such as Windows,
* this may behave as a reentrant mutex, you should not treat it like one. On
* platforms it is possible for it to be non-reentrant, it will be.
*/
AWS_COMMON_API
int aws_mutex_lock(struct aws_mutex *mutex);
/**
* Attempts to acquire the lock but returns immediately if it can not.
* While on some platforms such as Windows, this may behave as a reentrant mutex,
* you should not treat it like one. On platforms it is possible for it to be non-reentrant, it will be.
* Note: For windows, minimum support server version is Windows Server 2008 R2 [desktop apps | UWP apps]
*/
AWS_COMMON_API
int aws_mutex_try_lock(struct aws_mutex *mutex);
/**
* Releases the lock.
*/
AWS_COMMON_API
int aws_mutex_unlock(struct aws_mutex *mutex);
AWS_EXTERN_C_END
AWS_POP_SANE_WARNING_LEVEL
#endif /* AWS_COMMON_MUTEX_H */
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