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rewrote ZSTD_cwksp_initialAllocStart() to be easier to read

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following a discussion with @felixhandte
This commit is contained in:
Yann Collet 2024-10-22 16:22:17 -07:00
parent 16450d0732
commit 06b7cfabf8
1 changed files with 7 additions and 2 deletions
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9
lib/compress/zstd_cwksp.h
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@ -17,6 +17,7 @@
#include "../common/allocations.h" /* ZSTD_customMalloc, ZSTD_customFree */
#include "../common/zstd_internal.h"
#include "../common/portability_macros.h"
#include "../common/compiler.h" /* ZS2_isPower2 */
#if defined (__cplusplus)
extern "C" {
@ -275,8 +276,12 @@ MEM_STATIC size_t ZSTD_cwksp_bytes_to_align_ptr(void* ptr, const size_t alignByt
* Returns the initial value for allocStart which is used to determine the position from
* which we can allocate from the end of the workspace.
*/
MEM_STATIC void* ZSTD_cwksp_initialAllocStart(ZSTD_cwksp* ws) {
return (void*)((size_t)ws->workspaceEnd & (size_t)~(ZSTD_CWKSP_ALIGNMENT_BYTES-1));
MEM_STATIC void* ZSTD_cwksp_initialAllocStart(ZSTD_cwksp* ws)
{
char* endPtr = (char*)ws->workspaceEnd;
assert(ZSTD_isPower2(ZSTD_CWKSP_ALIGNMENT_BYTES));
endPtr = endPtr - ((size_t)endPtr % ZSTD_CWKSP_ALIGNMENT_BYTES);
return (void*)endPtr;
}
/**