+ for (i = 0; tries > 0 && i < limit; i++)
+ {
+ u32 chunk = loadRam32(A_HEAP_CURCHNK);
+ u32 chunk_hdr = loadRam32(chunk);
+ u32 next_chunk = chunk + 4 + (chunk_hdr & ~3);
+ u32 next_chunk_hdr = loadRam32(next_chunk);
+ use_cycles(20);
+ //printf(" c %08x %08x\n", chunk, chunk_hdr);
+ if (chunk_hdr & 1) {
+ // free chunk
+ if (chunk_hdr > (size | 1)) {
+ // split
+ u32 p2size = (chunk_hdr & ~3) - size - 4;
+ storeRam32(chunk + 4 + size, p2size | 1);
+ chunk_hdr = size | 1;
+ }
+ if (chunk_hdr == (size | 1)) {
+ storeRam32(chunk, size);
+ break;
+ }
+ // chunk too small
+ if (next_chunk_hdr & 1) {
+ // merge
+ u32 msize = (chunk_hdr & ~3) + 4 + (next_chunk_hdr & ~3);
+ storeRam32(chunk, msize | 1);
+ continue;