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Optimize memory layout

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Justine Tunney 2022-09-12 04:19:32 -07:00
parent 0305194d98
commit b69f3d2488
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GPG key ID: BE714B4575D6E328
41 changed files with 383 additions and 347 deletions
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8
third_party/zip/zipup.c vendored
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@ -27,6 +27,8 @@
#include "libc/sysv/consts/prot.h"
#include "libc/fmt/fmt.h"
#include "libc/stdio/stdio.h"
#include "libc/runtime/sysconf.h"
#include "libc/runtime/sysconf.h"
#include "libc/runtime/runtime.h"
#ifndef UTIL /* This module contains no code for Zip Utilities */
@ -537,17 +539,17 @@ struct zlist far *z; /* zip entry to compress */
if (window != NULL)
free(window); /* window can't be a mapped file here */
window_size = (ulg)q + MIN_LOOKAHEAD;
remain = window_size & (FRAMESIZE-1);
remain = window_size & (sysconf(_SC_PAGESIZE)-1);
/* If we can't touch the page beyond the end of file, we must
* allocate an extra page.
*/
if (remain > MIN_LOOKAHEAD) {
window = (uch*)mmap(0, window_size, PROT_READ, MAP_PRIVATE, ifile, 0);
} else {
window = (uch*)valloc(window_size - remain + FRAMESIZE);
window = (uch*)pvalloc(window_size - remain + sysconf(_SC_PAGESIZE));
if (window != NULL) {
window = (uch*)mmap((char*)window, window_size - remain, PROT_READ,
MAP_PRIVATE | MAP_FIXED, ifile, 0);
MAP_PRIVATE | MAP_FIXED, ifile, 0);
} else {
window = (uch*)(-1);
}