oculus1

annotate libovr/Src/Kernel/OVR_Allocator.cpp @ 21:ef4c9d8eeca7

added shaderless distortion method
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 02 Oct 2013 04:09:37 +0300
parents e2f9e4603129
children
rev   line source
nuclear@3 1 /************************************************************************************
nuclear@3 2
nuclear@3 3 Filename : OVR_Allocator.cpp
nuclear@3 4 Content : Installable memory allocator implementation
nuclear@3 5 Created : September 19, 2012
nuclear@3 6 Notes :
nuclear@3 7
nuclear@3 8 Copyright : Copyright 2012 Oculus VR, Inc. All Rights reserved.
nuclear@3 9
nuclear@3 10 Use of this software is subject to the terms of the Oculus license
nuclear@3 11 agreement provided at the time of installation or download, or which
nuclear@3 12 otherwise accompanies this software in either electronic or hard copy form.
nuclear@3 13
nuclear@3 14 ************************************************************************************/
nuclear@3 15
nuclear@3 16 #include "OVR_Allocator.h"
nuclear@3 17 #ifdef OVR_OS_MAC
nuclear@3 18 #include <stdlib.h>
nuclear@3 19 #else
nuclear@3 20 #include <malloc.h>
nuclear@3 21 #endif
nuclear@3 22
nuclear@3 23 namespace OVR {
nuclear@3 24
nuclear@3 25 //-----------------------------------------------------------------------------------
nuclear@3 26 // ***** Allocator
nuclear@3 27
nuclear@3 28 Allocator* Allocator::pInstance = 0;
nuclear@3 29
nuclear@3 30 // Default AlignedAlloc implementation will delegate to Alloc/Free after doing rounding.
nuclear@3 31 void* Allocator::AllocAligned(UPInt size, UPInt align)
nuclear@3 32 {
nuclear@3 33 OVR_ASSERT((align & (align-1)) == 0);
nuclear@3 34 align = (align > sizeof(UPInt)) ? align : sizeof(UPInt);
nuclear@3 35 UPInt p = (UPInt)Alloc(size+align);
nuclear@3 36 UPInt aligned = 0;
nuclear@3 37 if (p)
nuclear@3 38 {
nuclear@3 39 aligned = (UPInt(p) + align-1) & ~(align-1);
nuclear@3 40 if (aligned == p)
nuclear@3 41 aligned += align;
nuclear@3 42 *(((UPInt*)aligned)-1) = aligned-p;
nuclear@3 43 }
nuclear@3 44 return (void*)aligned;
nuclear@3 45 }
nuclear@3 46
nuclear@3 47 void Allocator::FreeAligned(void* p)
nuclear@3 48 {
nuclear@3 49 UPInt src = UPInt(p) - *(((UPInt*)p)-1);
nuclear@3 50 Free((void*)src);
nuclear@3 51 }
nuclear@3 52
nuclear@3 53
nuclear@3 54 //------------------------------------------------------------------------
nuclear@3 55 // ***** Default Allocator
nuclear@3 56
nuclear@3 57 // This allocator is created and used if no other allocator is installed.
nuclear@3 58 // Default allocator delegates to system malloc.
nuclear@3 59
nuclear@3 60 void* DefaultAllocator::Alloc(UPInt size)
nuclear@3 61 {
nuclear@3 62 return malloc(size);
nuclear@3 63 }
nuclear@3 64 void* DefaultAllocator::AllocDebug(UPInt size, const char* file, unsigned line)
nuclear@3 65 {
nuclear@3 66 #if defined(OVR_CC_MSVC) && defined(_CRTDBG_MAP_ALLOC)
nuclear@3 67 return _malloc_dbg(size, _NORMAL_BLOCK, file, line);
nuclear@3 68 #else
nuclear@3 69 OVR_UNUSED2(file, line);
nuclear@3 70 return malloc(size);
nuclear@3 71 #endif
nuclear@3 72 }
nuclear@3 73
nuclear@3 74 void* DefaultAllocator::Realloc(void* p, UPInt newSize)
nuclear@3 75 {
nuclear@3 76 return realloc(p, newSize);
nuclear@3 77 }
nuclear@3 78 void DefaultAllocator::Free(void *p)
nuclear@3 79 {
nuclear@3 80 return free(p);
nuclear@3 81 }
nuclear@3 82
nuclear@3 83
nuclear@3 84 } // OVR