mirror of https://github.com/rusefi/lua.git
90 lines
1.7 KiB
C
90 lines
1.7 KiB
C
/*
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** mem.c
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** TecCGraf - PUC-Rio
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*/
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char *rcs_mem = "$Id: mem.c,v 1.9 1996/03/14 15:55:49 roberto Exp roberto $";
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include "mem.h"
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#include "lua.h"
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#include "table.h"
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char *luaI_memerrormsg[NUMERRMSG] = {
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"code size overflow",
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"symbol table overflow",
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"constant table overflow",
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"stack size overflow",
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"lex buffer overflow",
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"lock table overflow"
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};
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static void mem_error (void)
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{
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Long recovered = luaI_collectgarbage(); /* try to collect garbage */
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if (recovered)
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lua_error("not enough memory");
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else
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{ /* if there is no garbage then must exit */
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fprintf(stderr, "lua error: memory overflow - unable to recover\n");
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exit(1);
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}
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}
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void luaI_free (void *block)
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{
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if (block)
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{
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*((int *)block) = -1; /* to catch errors */
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free(block);
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}
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}
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void *luaI_malloc (unsigned long size)
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{
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void *block = malloc((size_t)size);
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if (block == NULL)
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mem_error();
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return block;
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}
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void *luaI_realloc (void *oldblock, unsigned long size)
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{
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void *block = oldblock ? realloc(oldblock, (size_t)size) :
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malloc((size_t)size);
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if (block == NULL)
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mem_error();
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return block;
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}
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int luaI_growvector (void **block, unsigned long nelems, int size,
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enum memerrormsg errormsg, unsigned long limit)
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{
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if (nelems >= limit)
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lua_error(luaI_memerrormsg[errormsg]);
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nelems = (nelems == 0) ? 20 : nelems*2;
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if (nelems > limit)
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nelems = limit;
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*block = luaI_realloc(*block, nelems*size);
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return (int) nelems;
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}
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void* luaI_buffer (unsigned long size)
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{
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static unsigned long buffsize = 0;
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static char* buffer = NULL;
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if (size > buffsize)
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buffer = luaI_realloc(buffer, buffsize=size);
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return buffer;
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}
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