frost/secp256k1-zkp
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Prepare for manual memory management in preallocated memory

Browse Source 
* Determine ALIGNMENT more cleverly and move it to util.h
 * Implement manual_malloc() helper function
This commit is contained in:
Tim Ruffing
2018-10-18 19:09:51 +02:00
parent 36698dcfee
commit 1bf7c056ba
2 changed files with 43 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/scratch_impl.h
View File

@@ -7,14 +7,9 @@
#ifndef _SECP256K1_SCRATCH_IMPL_H_
#define _SECP256K1_SCRATCH_IMPL_H_
#include "util.h"
#include "scratch.h"
/* Using 16 bytes alignment because common architectures never have alignment
* requirements above 8 for any of the types we care about. In addition we
* leave some room because currently we don't care about a few bytes.
* TODO: Determine this at configure time. */
#define ALIGNMENT 16
static secp256k1_scratch* secp256k1_scratch_create(const secp256k1_callback* error_callback, size_t max_size) {
secp256k1_scratch* ret = (secp256k1_scratch*)checked_malloc(error_callback, sizeof(*ret));
if (ret != NULL) {
@@ -71,7 +66,7 @@ static void secp256k1_scratch_deallocate_frame(secp256k1_scratch* scratch) {
static void *secp256k1_scratch_alloc(secp256k1_scratch* scratch, size_t size) {
void *ret;
size_t frame = scratch->frame - 1;
size = ((size + ALIGNMENT - 1) / ALIGNMENT) * ALIGNMENT;
size = ROUND_TO_ALIGN(size);
if (scratch->frame == 0 || size + scratch->offset[frame] > scratch->frame_size[frame]) {
return NULL;