src/gallium/auxiliary/os/os_memory_win32k.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008-2010 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /*
  30  * OS memory management abstractions for Windows kernel.
  31  */
  32
  33
  34 #ifndef _OS_MEMORY_H_
  35 #error "Must not be included directly. Include os_memory.h instead"
  36 #endif
  37
  38
  39 #include "pipe/p_compiler.h"
  40
  41
  42 #ifdef __cplusplus
  43 extern "C" {
  44 #endif
  45
  46
  47 #if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
  48
  49 void * __stdcall
  50 EngAllocMem(unsigned long Flags,
  51             unsigned long MemSize,
  52             unsigned long Tag);
  53
  54 void __stdcall
  55 EngFreeMem(void *Mem);
  56
  57 #define os_malloc(_size) EngAllocMem(0, _size, 'D3AG')
  58 #define os_calloc(_count, _size) EngAllocMem(1, (_count)*(_size), 'D3AG')
  59 #define _os_free(_ptr) EngFreeMem(_ptr)
  60
  61 #elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
  62
  63 void *
  64 ExAllocatePool(unsigned long PoolType,
  65                size_t NumberOfBytes);
  66
  67 void
  68 ExFreePool(void *P);
  69
  70 #define os_malloc(_size) ExAllocatePool(0, _size)
  71 #define _os_free(_ptr) ExFreePool(_ptr)
  72
  73 static INLINE void *
  74 os_calloc(unsigned count, unsigned size)
  75 {
  76    void *ptr = os_malloc(count * size);
  77    if (ptr) {
  78       memset(ptr, 0, count * size);
  79    }
  80    return ptr;
  81 }
  82
  83 #else
  84
  85 #error "Unsupported subsystem"
  86
  87 #endif
  88
  89
  90 static INLINE void
  91 os_free( void *ptr )
  92 {
  93    if (ptr) {
  94       _os_free(ptr);
  95    }
  96 }
  97
  98
  99 static INLINE void *
 100 os_realloc(void *old_ptr, unsigned old_size, unsigned new_size)
 101 {
 102    void *new_ptr = NULL;
 103
 104    if (new_size != 0) {
 105       unsigned copy_size = old_size < new_size ? old_size : new_size;
 106       new_ptr = os_malloc( new_size );
 107       if (new_ptr && old_ptr && copy_size) {
 108          memcpy(new_ptr, old_ptr, copy_size);
 109       }
 110    }
 111
 112    os_free(old_ptr);
 113
 114    return new_ptr;
 115 }
 116
 117
 118 #ifdef __cplusplus
 119 }
 120 #endif
 121
 122
 123 #include "os_memory_aligned.h"