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/***************************************************************************************************
Zyan Core Library (Zycore-C)
Original Author : Florian Bernd
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
/**
* @file
* @brief
*/
#ifndef ZYCORE_API_THREAD_H
#define ZYCORE_API_THREAD_H
#include <Zycore/Defines.h>
#include <Zycore/Status.h>
#ifndef ZYAN_NO_LIBC
#ifdef __cplusplus
extern "C" {
#endif
/* ============================================================================================== */
/* Enums and types */
/* ============================================================================================== */
#if defined(ZYAN_POSIX)
#include <pthread.h>
/* ---------------------------------------------------------------------------------------------- */
/* General */
/* ---------------------------------------------------------------------------------------------- */
/**
* Defines the `ZyanThread` data-type.
*/
typedef pthread_t ZyanThread;
/**
* Defines the `ZyanThreadId` data-type.
*/
typedef ZyanU64 ZyanThreadId;
/* ---------------------------------------------------------------------------------------------- */
/* Thread Local Storage (TLS) */
/* ---------------------------------------------------------------------------------------------- */
/**
* Defines the `ZyanThreadTlsIndex` data-type.
*/
typedef pthread_key_t ZyanThreadTlsIndex;
/**
* Defines the `ZyanThreadTlsCallback` function prototype.
*/
typedef void(*ZyanThreadTlsCallback)(void* data);
/**
* Declares a Thread Local Storage (TLS) callback function.
*
* @param name The callback function name.
* @param param_type The callback data parameter type.
* @param param_name The callback data parameter name.
*/
#define ZYAN_THREAD_DECLARE_TLS_CALLBACK(name, param_type, param_name) \
void name(param_type* param_name)
/* ---------------------------------------------------------------------------------------------- */
#elif defined(ZYAN_WINDOWS)
#include <windows.h>
/* ---------------------------------------------------------------------------------------------- */
/* General */
/* ---------------------------------------------------------------------------------------------- */
/**
* Defines the `ZyanThread` data-type.
*/
typedef HANDLE ZyanThread;
/**
* Defines the `ZyanThreadId` data-type.
*/
typedef DWORD ZyanThreadId;
/* ---------------------------------------------------------------------------------------------- */
/* Thread Local Storage (TLS) */
/* ---------------------------------------------------------------------------------------------- */
/**
* Defines the `ZyanThreadTlsIndex` data-type.
*/
typedef DWORD ZyanThreadTlsIndex;
/**
* Defines the `ZyanThreadTlsCallback` function prototype.
*/
typedef PFLS_CALLBACK_FUNCTION ZyanThreadTlsCallback;
/**
* Declares a Thread Local Storage (TLS) callback function.
*
* @param name The callback function name.
* @param param_type The callback data parameter type.
* @param param_name The callback data parameter name.
*/
#define ZYAN_THREAD_DECLARE_TLS_CALLBACK(name, param_type, param_name) \
VOID NTAPI name(param_type* param_name)
/* ---------------------------------------------------------------------------------------------- */
#else
# error "Unsupported platform detected"
#endif
/* ============================================================================================== */
/* Exported functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* General */
/* ---------------------------------------------------------------------------------------------- */
/**
* Returns the handle of the current thread.
*
* @param thread Receives the handle of the current thread.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanThreadGetCurrentThread(ZyanThread* thread);
/**
* Returns the unique id of the current thread.
*
* @param thread_id Receives the unique id of the current thread.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanThreadGetCurrentThreadId(ZyanThreadId* thread_id);
/* ---------------------------------------------------------------------------------------------- */
/* Thread Local Storage (TLS) */
/* ---------------------------------------------------------------------------------------------- */
/**
* Allocates a new Thread Local Storage (TLS) slot.
*
* @param index Receives the TLS slot index.
* @param destructor A pointer to a destructor callback which is invoked to finalize the data
* in the TLS slot or `ZYAN_NULL`, if not needed.
*
* The maximum available number of TLS slots is implementation specific and different on each
* platform:
* - Windows
* - A total amount of 128 slots per process are guaranteed
* - POSIX
* - A total amount of 128 slots per process are guaranteed
* - Some systems guarantee larger amounts like e.g. 1024 slots per process
*
* Note that the invocation rules for the destructor callback are implementation specific and
* different on each platform:
* - Windows
* - The callback is invoked when a thread exits
* - The callback is invoked when the process exits
* - The callback is invoked when the TLS slot is released
* - POSIX
* - The callback is invoked when a thread exits and the stored value is not null
* - The callback is NOT invoked when the process exits
* - The callback is NOT invoked when the TLS slot is released
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanThreadTlsAlloc(ZyanThreadTlsIndex* index,
ZyanThreadTlsCallback destructor);
/**
* Releases a Thread Local Storage (TLS) slot.
*
* @param index The TLS slot index.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanThreadTlsFree(ZyanThreadTlsIndex index);
/**
* Returns the value inside the given Thread Local Storage (TLS) slot for the
* calling thread.
*
* @param index The TLS slot index.
* @param data Receives the value inside the given Thread Local Storage
* (TLS) slot for the calling thread.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanThreadTlsGetValue(ZyanThreadTlsIndex index, void** data);
/**
* Set the value of the given Thread Local Storage (TLS) slot for the calling thread.
*
* @param index The TLS slot index.
* @param data The value to store inside the given Thread Local Storage (TLS) slot for the
* calling thread
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanThreadTlsSetValue(ZyanThreadTlsIndex index, void* data);
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
#ifdef __cplusplus
}
#endif
#endif /* ZYAN_NO_LIBC */
#endif /* ZYCORE_API_THREAD_H */
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