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/*
* Copyright (C) 2013-2019 Free Software Foundation, Inc.
*
* This file is part of GNU lightning.
*
* GNU lightning is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU lightning is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* Authors:
* Paulo Cesar Pereira de Andrade
*/
#include <lightning.h>
#include <lightning/jit_private.h>
#ifdef _WIN32
# include <mman.h>
#else
# include <sys/mman.h>
#endif
/*
* Prototypes
*/
static void *jit_default_alloc_func(size_t);
static void *jit_default_realloc_func(void*, size_t);
static void jit_default_free_func(void *);
/*
* Initialization
*/
static jit_alloc_func_ptr jit_alloc_ptr = jit_default_alloc_func;
static jit_realloc_func_ptr jit_realloc_ptr = jit_default_realloc_func;
static jit_free_func_ptr jit_free_ptr = jit_default_free_func;
/*
* Implementation
*/
jit_pointer_t
jit_memcpy(jit_pointer_t dst, const void * src, jit_word_t size)
{
if (size)
return (memcpy(dst, src, size));
return (dst);
}
jit_pointer_t
jit_memmove(jit_pointer_t dst, const void *src , jit_word_t size)
{
if (size)
return (memmove(dst, src, size));
return (dst);
}
void
jit_set_memory_functions(jit_alloc_func_ptr alloc_ptr,
jit_realloc_func_ptr realloc_ptr,
jit_free_func_ptr free_ptr)
{
if (alloc_ptr == NULL)
alloc_ptr = jit_default_alloc_func;
if (realloc_ptr == NULL)
realloc_ptr = jit_default_realloc_func;
if (free_ptr == NULL)
free_ptr = jit_default_free_func;
jit_alloc_ptr = alloc_ptr;
jit_realloc_ptr = realloc_ptr;
jit_free_ptr = free_ptr;
}
void
jit_get_memory_functions(jit_alloc_func_ptr *alloc_ptr,
jit_realloc_func_ptr *realloc_ptr,
jit_free_func_ptr *free_ptr)
{
*alloc_ptr = jit_alloc_ptr;
*realloc_ptr = jit_realloc_ptr;
*free_ptr = jit_free_ptr;
}
void
jit_alloc(jit_pointer_t *ptr, jit_word_t size)
{
*ptr = (*jit_alloc_ptr)(size);
memset(*ptr, 0, size);
}
void
jit_realloc(jit_pointer_t *ptr, jit_word_t old_size, jit_word_t new_size)
{
*ptr = (*jit_realloc_ptr)(*ptr, new_size);
if (old_size < new_size)
memset((jit_int8_t*)*ptr + old_size, 0, new_size - old_size);
}
void
jit_free(jit_pointer_t *ptr)
{
if (*ptr) {
(*jit_free_ptr)(*ptr);
*ptr = NULL;
}
}
static void *
jit_default_alloc_func(size_t size)
{
return (malloc(size));
}
static void *
jit_default_realloc_func(void *ptr, size_t size)
{
return (realloc(ptr, size));
}
static void
jit_default_free_func(void *ptr)
{
free(ptr);
}
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