Memory.h

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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.
 
***************************************************************************************************/

 
#ifndef ZYCORE_API_MEMORY_H
#define ZYCORE_API_MEMORY_H
 
#include <Zycore/Defines.h>
#include <Zycore/Status.h>
#include <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                                                                                */
/* ============================================================================================== */

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                                                                                        */
/* ---------------------------------------------------------------------------------------------- */

ZYCORE_EXPORT ZyanU32 ZyanMemoryGetSystemPageSize(void);

ZYCORE_EXPORT ZyanU32 ZyanMemoryGetSystemAllocationGranularity(void);
 
/* ---------------------------------------------------------------------------------------------- */
/* Memory management                                                                              */
/* ---------------------------------------------------------------------------------------------- */

ZYCORE_EXPORT ZyanStatus ZyanMemoryVirtualProtect(void* address, ZyanUSize size,
    ZyanMemoryPageProtection protection);

ZYCORE_EXPORT ZyanStatus ZyanMemoryVirtualFree(void* address, ZyanUSize size);
 
/* ---------------------------------------------------------------------------------------------- */
 
/* ============================================================================================== */
 
#endif /* ZYAN_NO_LIBC */
 
#endif /* ZYCORE_API_MEMORY_H */