Last change
on this file since 352 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNLを追加
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Property svn:eol-style
set to
native
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Property svn:mime-type
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text/x-csrc;charset=UTF-8
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File size:
766 bytes
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Rev | Line | |
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[352] | 1 | #include <stdlib.h>
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| 2 | #include <stdint.h>
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| 3 | #include <limits.h>
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| 4 | #include <errno.h>
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| 5 | #include "libc.h"
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| 6 |
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| 7 | #define ALIGN 16
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| 8 |
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| 9 | void *__expand_heap(size_t *);
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| 10 |
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| 11 | static void *__simple_malloc(size_t n)
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| 12 | {
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| 13 | static char *cur, *end;
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| 14 | static volatile int lock[2];
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| 15 | size_t align=1, pad;
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| 16 | void *p;
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| 17 |
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| 18 | if (!n) n++;
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| 19 | while (align<n && align<ALIGN)
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| 20 | align += align;
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| 21 |
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| 22 | LOCK(lock);
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| 23 |
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| 24 | pad = -(uintptr_t)cur & align-1;
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| 25 |
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| 26 | if (n <= SIZE_MAX/2 + ALIGN) n += pad;
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| 27 |
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| 28 | if (n > end-cur) {
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| 29 | size_t m = n;
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| 30 | char *new = __expand_heap(&m);
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| 31 | if (!new) {
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| 32 | UNLOCK(lock);
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| 33 | return 0;
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| 34 | }
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| 35 | if (new != end) {
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| 36 | cur = new;
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| 37 | n -= pad;
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| 38 | pad = 0;
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| 39 | }
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| 40 | end = new + m;
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| 41 | }
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| 42 |
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| 43 | p = cur + pad;
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| 44 | cur += n;
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| 45 | UNLOCK(lock);
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| 46 | return p;
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| 47 | }
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| 48 |
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| 49 | weak_alias(__simple_malloc, malloc);
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| 50 | weak_alias(__simple_malloc, __malloc0);
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