/**
* Uniform blocks have one table containing just one entry. This is simply
* referred to by the lines ptr to save having another ptr in the block
* structure, or the hassle of a union. The uniform block table is allocated
* from state memory which is only 4 byte aligned, and 8 byte alignment is
* required.
*/
BackdropTable *bd_uniformTable(BackdropBlock *block)
{
HQASSERT(bd_isUniform(block), "Expected uniform block");
if ( block->resource )
return bd_blockLine(block, 0)->table;
else
return (BackdropTable*)DWORD_ALIGN_UP(uintptr_t, block->lines);
}
LPVOID
DRVALLOC(
DWORD cbAlloc
)
/*++
Routine Description:
This function will allocate local memory. It will possibly allocate extra
memory and fill this with debugging information for the debugging version.
Arguments:
cb - The amount of memory to allocate
Return Value:
NON-NULL - A pointer to the allocated memory
FALSE/NULL - The operation failed. Extended error status is available
using GetLastError.
--*/
{
LPDWORD pMem = NULL;
#if DBG
DWORD cbOld = 0;
cbOld = DWORD_ALIGN_UP(cbAlloc);
cbAlloc = cbOld + 4 * sizeof(DWORD);
#endif
#if NTGDIKM
pMem = (LPDWORD)EngAllocMem(0, cbAlloc,gulMemID);
#else
pMem = (LPDWORD)HeapAlloc( hHeap, HEAP_ZERO_MEMORY, cbAlloc );
#endif
#if DBG
if (!pMem)
{
EngAcquireSemaphore(hsem);
gFailCount++;
gbFailAllocs = TRUE;
EngReleaseSemaphore(hsem);
return (LPVOID)pMem;
}
else
{
EngAcquireSemaphore(hsem);
gAllocCount++;
EngReleaseSemaphore(hsem);
pMem[0] = cbOld;
#if (_MSC_VER >= 1000)
pMem[1] = (DWORD)_ReturnAddress();
#else
//
// Put in a bogus value to prevent 0 from being read back.
//
pMem[1] = 0xf987654f;
#endif
*(LPDWORD)((LPBYTE)&pMem[2] + cbOld)=0xdeadbeef;
return (LPVOID)&pMem[2];
}
#endif
return (LPVOID)pMem;
}
