/***************************************************************************************************
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_MEMORY_H
#define ZYCORE_API_MEMORY_H
#include "zydis/Zycore/Defines.h"
#include "zydis/Zycore/Status.h"
#include "zydis/Zycore/Types.h"
#ifndef ZYAN_NO_LIBC
#if defined (ZYAN_WINDOWS)
# include <windows.h>
#elif defined (ZYAN_POSIX)
# include <sys/mman.h>
#else
# error "Unsupported platform detected"
#endif
/* ============================================================================================== */
/* Enums and types */
/* ============================================================================================== */
/**
* Defines the ` ZyanMemoryPageProtection ` enum .
*/
typedef enum ZyanMemoryPageProtection_
{
#if defined (ZYAN_WINDOWS)
ZYAN_PAGE_READONLY = PAGE_READONLY,
ZYAN_PAGE_READWRITE = PAGE_READWRITE,
ZYAN_PAGE_EXECUTE = PAGE_EXECUTE,
ZYAN_PAGE_EXECUTE_READ = PAGE_EXECUTE_READ,
ZYAN_PAGE_EXECUTE_READWRITE = PAGE_EXECUTE_READWRITE
#elif defined (ZYAN_POSIX)
ZYAN_PAGE_READONLY = PROT_READ,
ZYAN_PAGE_READWRITE = PROT_READ | PROT_WRITE,
ZYAN_PAGE_EXECUTE = PROT_EXEC,
ZYAN_PAGE_EXECUTE_READ = PROT_EXEC | PROT_READ,
ZYAN_PAGE_EXECUTE_READWRITE = PROT_EXEC | PROT_READ | PROT_WRITE
#endif
} ZyanMemoryPageProtection;
/* ============================================================================================== */
/* Exported functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* General */
/* ---------------------------------------------------------------------------------------------- */
/**
* Returns the system page size .
*
* @ return The system page size .
*/
ZYCORE_EXPORT ZyanU32 ZyanMemoryGetSystemPageSize(void );
/**
* Returns the system allocation granularity .
*
* The system allocation granularity specifies the minimum amount of bytes which can be allocated
* at a specific address by a single call of ` ZyanMemoryVirtualAlloc ` .
*
* This value is typically 64 KiB on Windows systems and equal to the page size on most POSIX
* platforms .
*
* @ return The system allocation granularity .
*/
ZYCORE_EXPORT ZyanU32 ZyanMemoryGetSystemAllocationGranularity(void );
/* ---------------------------------------------------------------------------------------------- */
/* Memory management */
/* ---------------------------------------------------------------------------------------------- */
/**
* Changes the memory protection value of one or more pages .
*
* @ param address The start address aligned to a page boundary .
* @ param size The size .
* @ param protection The new page protection value .
*
* @ return A zyan status code .
*/
ZYCORE_EXPORT ZyanStatus ZyanMemoryVirtualProtect(void * address, ZyanUSize size,
ZyanMemoryPageProtection protection);
/**
* Releases one or more memory pages starting at the given address .
*
* @ param address The start address aligned to a page boundary .
* @ param size The size .
*
* @ return A zyan status code .
*/
ZYCORE_EXPORT ZyanStatus ZyanMemoryVirtualFree(void * address, ZyanUSize size);
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
#endif /* ZYAN_NO_LIBC */
#endif /* ZYCORE_API_MEMORY_H */
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