newlib/libgloss/libnosys/sbrk.c

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/* Version of sbrk for no operating system. */
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void *
_sbrk (incr)
int incr;
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{
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extern char end; /* Set by linker. */
static char * heap_end;
char * prev_heap_end;
if (heap_end == 0)
heap_end = & end;
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prev_heap_end = heap_end;
heap_end += incr;
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return (void *) prev_heap_end;
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}