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Rename membuffer to memstack

This commit is contained in:
Doyle Thai 2017-05-22 18:34:10 +10:00
parent 8ce4221ad2
commit 2c745d3571
5 changed files with 187 additions and 188 deletions
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52
src/DTRenderer.cpp
View File

@ -79,15 +79,15 @@ FILE_SCOPE bool ObjWavefrontLoad(const PlatformAPI api, PlatformMemory *const me
if (!api.FileOpen(path, &file, PlatformFilePermissionFlag_Read))
return false; // TODO(doyle): Logging
DqnTempBuffer tmpMemRegion = DqnMemBuffer_BeginTempRegion(&memory->transientBuffer);
u8 *rawBytes = (u8 *)DqnMemBuffer_Allocate(&memory->transientBuffer, file.size);
DqnTempMemStack tmpMemRegion = DqnMemStack_BeginTempRegion(&memory->transMemStack);
u8 *rawBytes = (u8 *)DqnMemStack_Allocate(&memory->transMemStack, file.size);
size_t bytesRead = api.FileRead(&file, rawBytes, file.size);
size_t fileSize = file.size;
api.FileClose(&file);
if (bytesRead != file.size)
{
// TODO(doyle): Logging
DqnMemBuffer_EndTempRegion(tmpMemRegion);
DqnMemStack_EndTempRegion(tmpMemRegion);
return false;
}
@ -101,7 +101,7 @@ FILE_SCOPE bool ObjWavefrontLoad(const PlatformAPI api, PlatformMemory *const me
WavefrontObj obj = {};
if (!ObjWaveFrontInit(&obj))
{
DqnMemBuffer_EndTempRegion(tmpMemRegion);
DqnMemStack_EndTempRegion(tmpMemRegion);
return false;
}
@ -310,8 +310,8 @@ FILE_SCOPE bool ObjWavefrontLoad(const PlatformAPI api, PlatformMemory *const me
DQN_ASSERT(obj.model.groupNameIndex + 1 < DQN_ARRAY_COUNT(obj.model.groupName));
DQN_ASSERT(!obj.model.groupName[obj.model.groupNameIndex]);
obj.model.groupName[obj.model.groupNameIndex++] = (char *)DqnMemBuffer_Allocate(
&memory->permanentBuffer, (nameLen + 1) * sizeof(char));
obj.model.groupName[obj.model.groupNameIndex++] = (char *)DqnMemStack_Allocate(
&memory->permMemStack, (nameLen + 1) * sizeof(char));
for (i32 i = 0; i < nameLen; i++)
obj.model.groupName[obj.model.groupNameIndex - 1][i] = namePtr[i];
@ -370,7 +370,7 @@ FILE_SCOPE bool ObjWavefrontLoad(const PlatformAPI api, PlatformMemory *const me
}
}
DqnMemBuffer_EndTempRegion(tmpMemRegion);
DqnMemStack_EndTempRegion(tmpMemRegion);
return true;
}
@ -396,14 +396,14 @@ FILE_SCOPE bool BitmapFontCreate(const PlatformAPI api,
if (!api.FileOpen(path, &file, PlatformFilePermissionFlag_Read))
return false; // TODO(doyle): Logging
DqnTempBuffer tmpMemRegion = DqnMemBuffer_BeginTempRegion(&memory->transientBuffer);
u8 *fontBuf = (u8 *)DqnMemBuffer_Allocate(&memory->transientBuffer, file.size);
DqnTempMemStack tmpMemRegion = DqnMemStack_BeginTempRegion(&memory->transMemStack);
u8 *fontBuf = (u8 *)DqnMemStack_Allocate(&memory->transMemStack, file.size);
size_t bytesRead = api.FileRead(&file, fontBuf, file.size);
api.FileClose(&file);
if (bytesRead != file.size)
{
// TODO(doyle): Logging
DqnMemBuffer_EndTempRegion(tmpMemRegion);
DqnMemStack_EndTempRegion(tmpMemRegion);
return false;
}
@ -418,8 +418,8 @@ FILE_SCOPE bool BitmapFontCreate(const PlatformAPI api,
////////////////////////////////////////////////////////////////////////////
// Pack font data to bitmap
////////////////////////////////////////////////////////////////////////////
loadedFont.bitmap = (u8 *)DqnMemBuffer_Allocate(
&memory->permanentBuffer,
loadedFont.bitmap = (u8 *)DqnMemStack_Allocate(
&memory->permMemStack,
(size_t)(loadedFont.bitmapDim.w * loadedFont.bitmapDim.h));
stbtt_pack_context fontPackContext = {};
@ -431,18 +431,18 @@ FILE_SCOPE bool BitmapFontCreate(const PlatformAPI api,
i32 numCodepoints =
(i32)((codepointRange.max + 1) - codepointRange.min);
loadedFont.atlas = (stbtt_packedchar *)DqnMemBuffer_Allocate(
&memory->permanentBuffer, numCodepoints * sizeof(stbtt_packedchar));
loadedFont.atlas = (stbtt_packedchar *)DqnMemStack_Allocate(
&memory->permMemStack, numCodepoints * sizeof(stbtt_packedchar));
stbtt_PackFontRange(&fontPackContext, fontBuf, 0,
STBTT_POINT_SIZE(sizeInPt), (i32)codepointRange.min,
numCodepoints, loadedFont.atlas);
stbtt_PackEnd(&fontPackContext);
DqnMemBuffer_EndTempRegion(tmpMemRegion);
DqnMemStack_EndTempRegion(tmpMemRegion);
}
else
{
DQN_ASSERT(DQN_INVALID_CODE_PATH);
DqnMemBuffer_EndTempRegion(tmpMemRegion);
DqnMemStack_EndTempRegion(tmpMemRegion);
return false;
}
@ -478,7 +478,7 @@ FILE_SCOPE bool BitmapFontCreate(const PlatformAPI api,
FILE_SCOPE bool BitmapLoad(const PlatformAPI api, DTRBitmap *bitmap,
const char *const path,
DqnMemBuffer *const transientBuffer)
DqnMemStack *const transMemStack)
{
if (!bitmap) return false;
@ -486,23 +486,23 @@ FILE_SCOPE bool BitmapLoad(const PlatformAPI api, DTRBitmap *bitmap,
if (!api.FileOpen(path, &file, PlatformFilePermissionFlag_Read))
return false;
DqnTempBuffer tempBuffer = DqnMemBuffer_BeginTempRegion(transientBuffer);
DqnTempMemStack tempBuffer = DqnMemStack_BeginTempRegion(transMemStack);
{
u8 *const rawData =
(u8 *)DqnMemBuffer_Allocate(transientBuffer, file.size);
(u8 *)DqnMemStack_Allocate(transMemStack, file.size);
size_t bytesRead = api.FileRead(&file, rawData, file.size);
api.FileClose(&file);
if (bytesRead != file.size)
{
DqnMemBuffer_EndTempRegion(tempBuffer);
DqnMemStack_EndTempRegion(tempBuffer);
return false;
}
bitmap->memory = stbi_load_from_memory(rawData, (i32)file.size, &bitmap->dim.w,
&bitmap->dim.h, &bitmap->bytesPerPixel, 4);
}
DqnMemBuffer_EndTempRegion(tempBuffer);
DqnMemStack_EndTempRegion(tempBuffer);
if (!bitmap->memory) return false;
const i32 pitch = bitmap->dim.w * bitmap->bytesPerPixel;
@ -1489,21 +1489,21 @@ extern "C" void DTR_Update(PlatformRenderBuffer *const renderBuffer,
memory->isInit = true;
memory->context =
DqnMemBuffer_Allocate(&memory->permanentBuffer, sizeof(DTRState));
DqnMemStack_Allocate(&memory->permMemStack, sizeof(DTRState));
DQN_ASSERT(memory->context);
state = (DTRState *)memory->context;
BitmapFontCreate(input->api, memory, &state->font, "Roboto-bold.ttf",
DqnV2i_2i(256, 256), DqnV2i_2i(' ', '~'), 12);
BitmapLoad(input->api, &state->bitmap, "tree00.bmp",
&memory->transientBuffer);
&memory->transMemStack);
DTRBitmap test = {};
DqnTempBuffer tmp = DqnMemBuffer_BeginTempRegion(&memory->permanentBuffer);
DqnTempMemStack tmp = DqnMemStack_BeginTempRegion(&memory->permMemStack);
BitmapLoad(input->api, &test, "byte_read_check.bmp",
&memory->transientBuffer);
&memory->transMemStack);
int x = 5;
DqnMemBuffer_EndTempRegion(tmp);
DqnMemStack_EndTempRegion(tmp);
ObjWavefrontLoad(input->api, memory, "african_head.obj");
}

12
src/DTRendererDebug.cpp
View File

@ -28,19 +28,19 @@ void DTRDebug_PushText(const char *const formatStr, ...)
}
}
FILE_SCOPE void PushMemBufferText(const char *const name,
const DqnMemBuffer *const buffer)
FILE_SCOPE void PushMemStackText(const char *const name,
const DqnMemStack *const stack)
{
if (DTR_DEBUG)
{
if (!buffer) return;
if (!stack) return;
size_t totalUsed = 0;
size_t totalSize = 0;
size_t totalWasted = 0;
i32 numBlocks = 0;
DqnMemBufferBlock *blockPtr = buffer->block;
DqnMemStackBlock *blockPtr = stack->block;
while (blockPtr)
{
totalUsed += blockPtr->used;
@ -88,8 +88,8 @@ void DTRDebug_Update(DTRState *const state,
// memory
{
PushMemBufferText("PermBuffer", &memory->permanentBuffer);
PushMemBufferText("TransBuffer", &memory->transientBuffer);
PushMemStackText("PermBuffer", &memory->permMemStack);
PushMemStackText("TransBuffer", &memory->transMemStack);
}
DTRDebug_PushText("SSE2Support: %s", (input->canUseSSE2) ? "true" : "false");

4
src/DTRendererPlatform.h
View File

@ -110,8 +110,8 @@ typedef struct PlatformInput
typedef struct PlatformMemory
{
DqnMemBuffer permanentBuffer;
DqnMemBuffer transientBuffer;
DqnMemStack permMemStack;
DqnMemStack transMemStack;
bool isInit;
void *context;
} PlatformMemory;

28
src/Win32DTRenderer.cpp
View File

@ -257,21 +257,21 @@ FILE_SCOPE void Win32HandleMenuMessages(HWND window, MSG msg,
case Win32Menu_FileFlushMemory:
{
DqnMemBuffer permBuffer = globalPlatformMemory.permanentBuffer;
DqnMemBuffer transBuffer = globalPlatformMemory.transientBuffer;
while (permBuffer.block->prevBlock)
DqnMemBuffer_FreeLastBlock(&permBuffer);
DqnMemStack permMemStack = globalPlatformMemory.permMemStack;
DqnMemStack transMemStack = globalPlatformMemory.transMemStack;
while (permMemStack.block->prevBlock)
DqnMemStack_FreeLastBlock(&permMemStack);
while (transBuffer.block->prevBlock)
DqnMemBuffer_FreeLastBlock(&transBuffer);
while (transMemStack.block->prevBlock)
DqnMemStack_FreeLastBlock(&transMemStack);
DqnMemBuffer_ClearCurrBlock(&transBuffer, true);
DqnMemBuffer_ClearCurrBlock(&permBuffer, true);
DqnMemStack_ClearCurrBlock(&transMemStack, true);
DqnMemStack_ClearCurrBlock(&permMemStack, true);
PlatformMemory empty = {};
globalPlatformMemory = empty;
globalPlatformMemory.permanentBuffer = permBuffer;
globalPlatformMemory.transientBuffer = transBuffer;
PlatformMemory empty = {};
globalPlatformMemory = empty;
globalPlatformMemory.permMemStack = permMemStack;
globalPlatformMemory.transMemStack = transMemStack;
}
break;
@ -502,8 +502,8 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
////////////////////////////////////////////////////////////////////////////
// Platform Data Pre-amble
////////////////////////////////////////////////////////////////////////////
DQN_ASSERT(DqnMemBuffer_Init(&globalPlatformMemory.permanentBuffer, DQN_MEGABYTE(1), true, 4) &&
DqnMemBuffer_Init(&globalPlatformMemory.transientBuffer, DQN_MEGABYTE(1), true, 4));
DQN_ASSERT(DqnMemStack_Init(&globalPlatformMemory.permMemStack, DQN_MEGABYTE(1), true, 4) &&
DqnMemStack_Init(&globalPlatformMemory.transMemStack, DQN_MEGABYTE(1), true, 4));
PlatformAPI platformAPI = {};
platformAPI.FileOpen = Platform_FileOpen;

279
src/dqn.h
View File

@ -67,92 +67,92 @@ DQN_FILE_SCOPE void *DqnMem_Realloc(void *memory, size_t newSize);
DQN_FILE_SCOPE void DqnMem_Free (void *memory);
////////////////////////////////////////////////////////////////////////////////
// DqnMemBuffer - Memory Buffer, For push buffer/ptr memory style management
// DqnMemStack - Memory Stack, For push stack/ptr memory style management
////////////////////////////////////////////////////////////////////////////////
// DqnMemBuffer is a data structure to dynamically allocate memory in a stack
// DqnMemStack is a data structure to dynamically allocate memory in a stack
// like style. It pre-allocates a block of memory in init and sub-allocates from
// this block to take advantage of memory locality.
// When an allocation requires a larger amount of memory than available in the
// block then the MemBuffer will allocate a new block of sufficient size for
// you in DqnMemBuffer_Allocate(..). This _DOES_ mean that there will be wasted
// block then the MemStack will allocate a new block of sufficient size for
// you in DqnMemStack_Allocate(..). This _DOES_ mean that there will be wasted
// space at the end of each block and is a tradeoff for memory locality against
// optimal space usage.
// How To Use:
// 1. Create a DqnMemBuffer struct and pass it into an initialisation function
// 1. Create a DqnMemStack struct and pass it into an initialisation function
// - InitWithFixedMem() allows you to pass in your own memory which is
// converted to a memory block. This disables dynamic allocation.
// NOTE: Space is reserved in the given memory for MemBufferBlock metadata.
// NOTE: Space is reserved in the given memory for MemStackBlock metadata.
// - InitWithFixedSize() allows you to to disable dynamic allocations and
// sub-allocate from the initial MemBuffer allocation size only.
// sub-allocate from the initial MemStack allocation size only.
// 2. Use DqnMemBuffer_Allocate(..) to allocate memory for use.
// - "Freeing" memory is dealt by creating temporary MemBuffers or using the
// 2. Use DqnMemStack_Allocate(..) to allocate memory for use.
// - "Freeing" memory is dealt by creating temporary MemStacks or using the
// BeginTempRegion and EndTempRegion functions. Specifically freeing
// individual items is typically not generalisable in this scheme.
typedef struct DqnMemBufferBlock
typedef struct DqnMemStackBlock
{
u8 *memory;
size_t used;
size_t size;
DqnMemBufferBlock *prevBlock;
} DqnMemBufferBlock;
DqnMemStackBlock *prevBlock;
} DqnMemStackBlock;
enum DqnMemBufferFlag
enum DqnMemStackFlag
{
DqnMemBufferFlag_IsNotExpandable = (1 << 0),
DqnMemBufferFlag_IsFixedMemoryFromUser = (1 << 1), // NOTE(doyle): Required to indicate we CAN'T free this memory when free is called.
DqnMemStackFlag_IsNotExpandable = (1 << 0),
DqnMemStackFlag_IsFixedMemoryFromUser = (1 << 1), // NOTE(doyle): Required to indicate we CAN'T free this memory when free is called.
};
typedef struct DqnMemBuffer
typedef struct DqnMemStack
{
DqnMemBufferBlock *block;
DqnMemStackBlock *block;
u32 flags;
i32 tempBufferCount;
i32 tempStackCount;
u32 byteAlign;
} DqnMemBuffer;
} DqnMemStack;
typedef struct DqnTempBuffer
typedef struct DqnTempMemStack
{
DqnMemBuffer *buffer;
DqnMemBufferBlock *startingBlock;
DqnMemStack *stack;
DqnMemStackBlock *startingBlock;
size_t used;
} DqnTempBuffer;
} DqnTempMemStack;
DQN_FILE_SCOPE bool DqnMemBuffer_InitWithFixedMem (DqnMemBuffer *const buffer, u8 *const mem, const size_t memSize, const u32 byteAlign = 4); // Use preallocated memory, no further allocations, returns NULL on allocate if out of space
DQN_FILE_SCOPE bool DqnMemBuffer_InitWithFixedSize(DqnMemBuffer *const buffer, size_t size, const bool zeroClear, const u32 byteAlign = 4); // Single allocation from platform, no further allocations, returns NULL of allocate if out of space
DQN_FILE_SCOPE bool DqnMemBuffer_Init (DqnMemBuffer *const buffer, size_t size, const bool zeroClear, const u32 byteAlign = 4); // Allocates from platform dynamically as space runs out
DQN_FILE_SCOPE bool DqnMemStack_InitWithFixedMem (DqnMemStack *const stack, u8 *const mem, const size_t memSize, const u32 byteAlign = 4); // Use preallocated memory, no further allocations, returns NULL on allocate if out of space
DQN_FILE_SCOPE bool DqnMemStack_InitWithFixedSize(DqnMemStack *const stack, size_t size, const bool zeroClear, const u32 byteAlign = 4); // Single allocation from platform, no further allocations, returns NULL of allocate if out of space
DQN_FILE_SCOPE bool DqnMemStack_Init (DqnMemStack *const stack, size_t size, const bool zeroClear, const u32 byteAlign = 4); // Allocates from platform dynamically as space runs out
DQN_FILE_SCOPE void *DqnMemBuffer_Allocate (DqnMemBuffer *const buffer, size_t size); // Returns NULL if out of space and buffer is using fixed memory/size, or platform allocation fails
DQN_FILE_SCOPE void DqnMemBuffer_Free (DqnMemBuffer *const buffer); // Frees all blocks belonging to this buffer
DQN_FILE_SCOPE bool DqnMemBuffer_FreeBufferBlock(DqnMemBuffer *const buffer, DqnMemBufferBlock *block); // Frees the specified block, returns false if block doesn't belong
DQN_FILE_SCOPE bool DqnMemBuffer_FreeLastBlock (DqnMemBuffer *const buffer); // Frees the last-most memory block. If last block, free that block, next allocate will attach a block.
DQN_FILE_SCOPE void DqnMemBuffer_ClearCurrBlock (DqnMemBuffer *const buffer, const bool zeroClear); // Reset the current memory block usage to 0
DQN_FILE_SCOPE void *DqnMemStack_Allocate (DqnMemStack *const stack, size_t size); // Returns NULL if out of space and stack is using fixed memory/size, or platform allocation fails
DQN_FILE_SCOPE void DqnMemStack_Free (DqnMemStack *const stack); // Frees all blocks belonging to this stack
DQN_FILE_SCOPE bool DqnMemStack_FreeStackBlock (DqnMemStack *const stack, DqnMemStackBlock *block); // Frees the specified block, returns false if block doesn't belong
DQN_FILE_SCOPE bool DqnMemStack_FreeLastBlock (DqnMemStack *const stack); // Frees the last-most memory block. If last block, free that block, next allocate will attach a block.
DQN_FILE_SCOPE void DqnMemStack_ClearCurrBlock (DqnMemStack *const stack, const bool zeroClear); // Reset the current memory block usage to 0
// TempBuffer is only required for the function. Once BeginTempRegion() is called, subsequent allocation calls can be made using the original buffer.
// Upon EndTempRegion() the original buffer will free any additional blocks it allocated during the temp region and revert to the original
// TempMemStack is only required for the function. Once BeginTempRegion() is called, subsequent allocation calls can be made using the original stack.
// Upon EndTempRegion() the original stack will free any additional blocks it allocated during the temp region and revert to the original
// state before BeginTempRegion() was called.
// WARNING: Any calls to Free/Clear functions in a TempRegion will invalidate and trash the buffer structure.
// WARNING: Any calls to Free/Clear functions in a TempRegion will invalidate and trash the stack structure.
// TODO(doyle): Look into a way of disallowing calls to free/clear in temp regions
DQN_FILE_SCOPE DqnTempBuffer DqnMemBuffer_BeginTempRegion(DqnMemBuffer *const buffer);
DQN_FILE_SCOPE void DqnMemBuffer_EndTempRegion (DqnTempBuffer tempBuffer);
DQN_FILE_SCOPE DqnTempMemStack DqnMemStack_BeginTempRegion(DqnMemStack *const stack);
DQN_FILE_SCOPE void DqnMemStack_EndTempRegion (DqnTempMemStack tempstack);
// (OPTIONAL) DqnMemBuffer Advanced API
// (OPTIONAL) DqnMemStack Advanced API
// This is useful for forcing a new block to be used. AllocateCompatibleBlock
// will fail if the supplied buffer has flags set such that the buffer is not
// will fail if the supplied stack has flags set such that the stack is not
// allowed to have new blocks.
DQN_FILE_SCOPE DqnMemBufferBlock *DqnMemBuffer_AllocateCompatibleBlock(const DqnMemBuffer *const buffer, size_t size);
DQN_FILE_SCOPE bool DqnMemBuffer_AttachBlock (DqnMemBuffer *const buffer, DqnMemBufferBlock *const newBlock);
DQN_FILE_SCOPE DqnMemStackBlock *DqnMemStack_AllocateCompatibleBlock(const DqnMemStack *const stack, size_t size);
DQN_FILE_SCOPE bool DqnMemStack_AttachBlock (DqnMemStack *const stack, DqnMemStackBlock *const newBlock);
// (IMPORTANT) Should only be used to free blocks that haven't been attached!
// Attached blocks should be freed using FreeBufferBlock().
DQN_FILE_SCOPE void DqnMemBuffer_FreeBlock(DqnMemBufferBlock *block);
// Attached blocks should be freed using FreeStackBlock().
DQN_FILE_SCOPE void DqnMemStack_FreeBlock(DqnMemStackBlock *block);
////////////////////////////////////////////////////////////////////////////////
// DqnMemAPI - Memory API, For using custom allocators
@ -1339,17 +1339,17 @@ DQN_FILE_SCOPE void DqnMem_Free(void *memory)
}
////////////////////////////////////////////////////////////////////////////////
// DqnMemBuffer - Memory API, For using custom allocators
// DqnMemStack - Memory API, For using custom allocators
////////////////////////////////////////////////////////////////////////////////
DQN_FILE_SCOPE DqnMemBufferBlock *
DqnMemBuffer_AllocateBlockInternal(u32 byteAlign, size_t size)
DQN_FILE_SCOPE DqnMemStackBlock *
DqnMemStack_AllocateBlockInternal(u32 byteAlign, size_t size)
{
size_t alignedSize = DQN_ALIGN_POW_N(size, byteAlign);
size_t totalSize = alignedSize + sizeof(DqnMemBufferBlock) + (byteAlign -1);
size_t totalSize = alignedSize + sizeof(DqnMemStackBlock) + (byteAlign -1);
// NOTE(doyle): Total size includes another (byteAlign-1) since we also want
// to align the base pointer to memory that we receive.
DqnMemBufferBlock *result = (DqnMemBufferBlock *)DqnMem_Calloc(totalSize);
DqnMemStackBlock *result = (DqnMemStackBlock *)DqnMem_Calloc(totalSize);
if (!result) return NULL;
result->memory = (u8 *)DQN_ALIGN_POW_N((u8 *)result + sizeof(*result), byteAlign);
@ -1358,110 +1358,110 @@ DqnMemBuffer_AllocateBlockInternal(u32 byteAlign, size_t size)
return result;
}
DQN_FILE_SCOPE DqnMemBufferBlock *
DqnMemBuffer_AllocateCompatibleBlock(const DqnMemBuffer *const buffer, size_t size)
DQN_FILE_SCOPE DqnMemStackBlock *
DqnMemStack_AllocateCompatibleBlock(const DqnMemStack *const stack, size_t size)
{
if (!buffer) return NULL;
if (buffer->flags & DqnMemBufferFlag_IsFixedMemoryFromUser) return NULL;
if (buffer->flags & DqnMemBufferFlag_IsNotExpandable) return NULL;
if (!stack) return NULL;
if (stack->flags & DqnMemStackFlag_IsFixedMemoryFromUser) return NULL;
if (stack->flags & DqnMemStackFlag_IsNotExpandable) return NULL;
DqnMemBufferBlock *block =
DqnMemBuffer_AllocateBlockInternal(buffer->byteAlign, size);
DqnMemStackBlock *block =
DqnMemStack_AllocateBlockInternal(stack->byteAlign, size);
return block;
}
DQN_FILE_SCOPE bool DqnMemBuffer_AttachBlock(DqnMemBuffer *const buffer,
DqnMemBufferBlock *const newBlock)
DQN_FILE_SCOPE bool DqnMemStack_AttachBlock(DqnMemStack *const stack,
DqnMemStackBlock *const newBlock)
{
if (!buffer || !newBlock) return false;
if (buffer->flags & DqnMemBufferFlag_IsFixedMemoryFromUser) return false;
if (buffer->flags & DqnMemBufferFlag_IsNotExpandable) return false;
if (!stack || !newBlock) return false;
if (stack->flags & DqnMemStackFlag_IsFixedMemoryFromUser) return false;
if (stack->flags & DqnMemStackFlag_IsNotExpandable) return false;
newBlock->prevBlock = buffer->block;
buffer->block = newBlock;
newBlock->prevBlock = stack->block;
stack->block = newBlock;
return true;
}
DQN_FILE_SCOPE void DqnMemBuffer_FreeBlock(DqnMemBufferBlock *block)
DQN_FILE_SCOPE void DqnMemStack_FreeBlock(DqnMemStackBlock *block)
{
if (!block) return;
DqnMem_Free(block);
}
DQN_FILE_SCOPE bool DqnMemBuffer_InitWithFixedMem(DqnMemBuffer *const buffer,
DQN_FILE_SCOPE bool DqnMemStack_InitWithFixedMem(DqnMemStack *const stack,
u8 *const mem,
const size_t memSize,
const u32 byteAlign)
{
if (!buffer || !mem) return false;
DQN_ASSERT(!buffer->block);
if (!stack || !mem) return false;
DQN_ASSERT(!stack->block);
// TODO(doyle): Better logging
if (memSize < sizeof(DqnMemBufferBlock))
if (memSize < sizeof(DqnMemStackBlock))
DQN_ASSERT(DQN_INVALID_CODE_PATH);
buffer->block = (DqnMemBufferBlock *)mem;
buffer->block->memory = mem + sizeof(DqnMemBufferBlock);
buffer->block->used = 0;
buffer->block->size = memSize - sizeof(DqnMemBufferBlock);
buffer->flags = (DqnMemBufferFlag_IsFixedMemoryFromUser | DqnMemBufferFlag_IsNotExpandable);
stack->block = (DqnMemStackBlock *)mem;
stack->block->memory = mem + sizeof(DqnMemStackBlock);
stack->block->used = 0;
stack->block->size = memSize - sizeof(DqnMemStackBlock);
stack->flags = (DqnMemStackFlag_IsFixedMemoryFromUser | DqnMemStackFlag_IsNotExpandable);
const u32 DEFAULT_ALIGNMENT = 4;
buffer->tempBufferCount = 0;
buffer->byteAlign = (byteAlign == 0) ? DEFAULT_ALIGNMENT : byteAlign;
stack->tempStackCount = 0;
stack->byteAlign = (byteAlign == 0) ? DEFAULT_ALIGNMENT : byteAlign;
return true;
}
DQN_FILE_SCOPE bool DqnMemBuffer_Init(DqnMemBuffer *const buffer, size_t size,
DQN_FILE_SCOPE bool DqnMemStack_Init(DqnMemStack *const stack, size_t size,
const bool zeroClear,
const u32 byteAlign)
{
if (!buffer || size <= 0) return false;
DQN_ASSERT(!buffer->block);
if (!stack || size <= 0) return false;
DQN_ASSERT(!stack->block);
buffer->block = DqnMemBuffer_AllocateBlockInternal(byteAlign, size);
if (!buffer->block) return false;
stack->block = DqnMemStack_AllocateBlockInternal(byteAlign, size);
if (!stack->block) return false;
buffer->tempBufferCount = 0;
buffer->byteAlign = byteAlign;
buffer->flags = 0;
stack->tempStackCount = 0;
stack->byteAlign = byteAlign;
stack->flags = 0;
return true;
}
DQN_FILE_SCOPE bool DqnMemBuffer_InitWithFixedSize(DqnMemBuffer *const buffer,
DQN_FILE_SCOPE bool DqnMemStack_InitWithFixedSize(DqnMemStack *const stack,
size_t size,
const bool zeroClear,
const u32 byteAlign)
{
bool result = DqnMemBuffer_Init(buffer, size, byteAlign);
bool result = DqnMemStack_Init(stack, size, byteAlign);
if (result)
{
buffer->flags |= DqnMemBufferFlag_IsNotExpandable;
stack->flags |= DqnMemStackFlag_IsNotExpandable;
return true;
}
return false;
}
DQN_FILE_SCOPE void *DqnMemBuffer_Allocate(DqnMemBuffer *const buffer, size_t size)
DQN_FILE_SCOPE void *DqnMemStack_Allocate(DqnMemStack *const stack, size_t size)
{
if (!buffer || size == 0) return NULL;
if (!stack || size == 0) return NULL;
size_t alignedSize = DQN_ALIGN_POW_N(size, buffer->byteAlign);
if (!buffer->block ||
(buffer->block->used + alignedSize) > buffer->block->size)
size_t alignedSize = DQN_ALIGN_POW_N(size, stack->byteAlign);
if (!stack->block ||
(stack->block->used + alignedSize) > stack->block->size)
{
size_t newBlockSize;
// TODO(doyle): Allocate block size based on the aligned size or
// a minimum block size? Not allocate based on the current block
// size
if (buffer->block) newBlockSize = DQN_MAX(alignedSize, buffer->block->size);
if (stack->block) newBlockSize = DQN_MAX(alignedSize, stack->block->size);
else newBlockSize = alignedSize;
DqnMemBufferBlock *newBlock = DqnMemBuffer_AllocateCompatibleBlock(buffer, newBlockSize);
DqnMemStackBlock *newBlock = DqnMemStack_AllocateCompatibleBlock(stack, newBlockSize);
if (newBlock)
{
if (!DqnMemBuffer_AttachBlock(buffer, newBlock))
if (!DqnMemStack_AttachBlock(stack, newBlock))
{
// IMPORTANT(doyle): This should be impossible, considering that
// AllocateCompatibleBlock checks the preconditions that the new
@ -1475,48 +1475,48 @@ DQN_FILE_SCOPE void *DqnMemBuffer_Allocate(DqnMemBuffer *const buffer, size_t si
}
else
{
// TODO: Better notifying to user, out of space in buffer OR buffer
// TODO: Better notifying to user, out of space in stack OR stack
// is configured such that new blocks are not allowed.
return NULL;
}
}
u8 *currPointer = buffer->block->memory + buffer->block->used;
u8 *alignedResult = (u8 *)DQN_ALIGN_POW_N(currPointer, buffer->byteAlign);
u8 *currPointer = stack->block->memory + stack->block->used;
u8 *alignedResult = (u8 *)DQN_ALIGN_POW_N(currPointer, stack->byteAlign);
size_t alignmentOffset = (size_t)(alignedResult - currPointer);
// NOTE(doyle): Since all buffers can't change alignment once they've been
// NOTE(doyle): Since all stack can't change alignment once they've been
// initialised and that the base memory ptr is already aligned, then all
// subsequent allocations should also be aligned automatically.
// TODO(doyle): In the future, do we want to allow arbitrary alignment PER
// allocation, not per MemBuffer?
// allocation, not per MemStack?
DQN_ASSERT(alignmentOffset == 0);
void *result = alignedResult;
buffer->block->used += (alignedSize + alignmentOffset);
DQN_ASSERT(buffer->block->used <= buffer->block->size);
stack->block->used += (alignedSize + alignmentOffset);
DQN_ASSERT(stack->block->used <= stack->block->size);
return result;
}
DQN_FILE_SCOPE bool DqnMemBuffer_FreeBufferBlock(DqnMemBuffer *const buffer,
DqnMemBufferBlock *block)
DQN_FILE_SCOPE bool DqnMemStack_FreeStackBlock(DqnMemStack *const stack,
DqnMemStackBlock *block)
{
if (!buffer || !block || !buffer->block) return false;
if (buffer->flags & DqnMemBufferFlag_IsFixedMemoryFromUser) return false;
if (!stack || !block || !stack->block) return false;
if (stack->flags & DqnMemStackFlag_IsFixedMemoryFromUser) return false;
DqnMemBufferBlock **blockPtr = &buffer->block;
DqnMemStackBlock **blockPtr = &stack->block;
while (*blockPtr && (*blockPtr) != block)
blockPtr = &((*blockPtr)->prevBlock);
if (*blockPtr)
{
DqnMemBufferBlock *blockToFree = *blockPtr;
DqnMemStackBlock *blockToFree = *blockPtr;
(*blockPtr) = blockToFree->prevBlock;
DqnMem_Free(blockToFree);
// No more blocks, then last block has been freed
if (!buffer->block) DQN_ASSERT(buffer->tempBufferCount == 0);
if (!stack->block) DQN_ASSERT(stack->tempStackCount == 0);
return true;
}
@ -1524,73 +1524,72 @@ DQN_FILE_SCOPE bool DqnMemBuffer_FreeBufferBlock(DqnMemBuffer *const buffer,
}
DQN_FILE_SCOPE bool
DqnMemBuffer_FreeLastBlock(DqnMemBuffer *const buffer)
DqnMemStack_FreeLastBlock(DqnMemStack *const stack)
{
bool result = DqnMemBuffer_FreeBufferBlock(buffer, buffer->block);
bool result = DqnMemStack_FreeStackBlock(stack, stack->block);
return result;
}
DQN_FILE_SCOPE void DqnMemBuffer_Free(DqnMemBuffer *buffer)
DQN_FILE_SCOPE void DqnMemStack_Free(DqnMemStack *stack)
{
if (!buffer) return;
if (!stack) return;
// NOTE(doyle): User is in charge of freeing this memory, so all we need to
// do is clear the block.
if (buffer->flags & DqnMemBufferFlag_IsFixedMemoryFromUser)
if (stack->flags & DqnMemStackFlag_IsFixedMemoryFromUser)
{
DQN_ASSERT(!buffer->block->prevBlock);
DqnMemBuffer_ClearCurrBlock(buffer, false);
DQN_ASSERT(!stack->block->prevBlock);
DqnMemStack_ClearCurrBlock(stack, false);
return;
}
while (buffer->block)
DqnMemBuffer_FreeLastBlock(buffer);
while (stack->block)
DqnMemStack_FreeLastBlock(stack);
// After a buffer is free, we reset the not expandable flag so that if we
// allocate on an empty buffer it still works.
buffer->flags &= ~DqnMemBufferFlag_IsNotExpandable;
// After a stack is free, we reset the not expandable flag so that if we
// allocate on an empty stack it still works.
stack->flags &= ~DqnMemStackFlag_IsNotExpandable;
}
DQN_FILE_SCOPE void DqnMemBuffer_ClearCurrBlock(DqnMemBuffer *const buffer,
DQN_FILE_SCOPE void DqnMemStack_ClearCurrBlock(DqnMemStack *const stack,
const bool zeroClear)
{
if (!buffer) return;
if (buffer->block)
if (!stack) return;
if (stack->block)
{
buffer->block->used = 0;
stack->block->used = 0;
if (zeroClear)
{
DqnMem_Clear(buffer->block->memory, 0,
buffer->block->size);
DqnMem_Clear(stack->block->memory, 0, stack->block->size);
}
}
}
DQN_FILE_SCOPE DqnTempBuffer
DqnMemBuffer_BeginTempRegion(DqnMemBuffer *const buffer)
DQN_FILE_SCOPE DqnTempMemStack
DqnMemStack_BeginTempRegion(DqnMemStack *const stack)
{
DqnTempBuffer result = {};
result.buffer = buffer;
result.startingBlock = buffer->block;
result.used = buffer->block->used;
DqnTempMemStack result = {};
result.stack = stack;
result.startingBlock = stack->block;
result.used = stack->block->used;
buffer->tempBufferCount++;
stack->tempStackCount++;
return result;
}
DQN_FILE_SCOPE void DqnMemBuffer_EndTempRegion(DqnTempBuffer tempBuffer)
DQN_FILE_SCOPE void DqnMemStack_EndTempRegion(DqnTempMemStack tempStack)
{
DqnMemBuffer *buffer = tempBuffer.buffer;
while (buffer->block != tempBuffer.startingBlock)
DqnMemBuffer_FreeLastBlock(buffer);
DqnMemStack *stack = tempStack.stack;
while (stack->block != tempStack.startingBlock)
DqnMemStack_FreeLastBlock(stack);
if (buffer->block)
if (stack->block)
{
DQN_ASSERT(buffer->block->used >= tempBuffer.used);
buffer->block->used = tempBuffer.used;
DQN_ASSERT(buffer->tempBufferCount >= 0);
DQN_ASSERT(stack->block->used >= tempStack.used);
stack->block->used = tempStack.used;
DQN_ASSERT(stack->tempStackCount >= 0);
}
buffer->tempBufferCount--;
stack->tempStackCount--;
}
////////////////////////////////////////////////////////////////////////////////