67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* free.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/02/17 12:28:03 by jhalford #+# #+# */
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/* Updated: 2017/10/07 16:29:44 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "malloc_internal.h"
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volatile int g_malloc_debug;
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int coalesce_nodes(t_node *node)
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{
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t_node *next;
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show_alloc_mem();
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if (node->islast)
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return (0);
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next = (void*)node + node->size;
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if (node->isfree && next->isfree)
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{
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if (g_malloc_debug >= 2)
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{
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DGSH("coalescing 2 nodes at addr", (long)node);
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DGSH("and addr", (long)next);
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}
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node->islast = next->islast;
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node->size += next->size;
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}
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return (0);
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}
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int ret_free(void *ptr)
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{
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t_chunk *zone;
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t_node *node;
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t_node *prev;
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if (!ptr)
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return (2);
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node = ptr - M_NODEHEAD;
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zone = *get_zone(node->size);
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if (!(prev = find_prev_node(zone, node)))
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{
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return (1);
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}
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node->isfree = 1;
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coalesce_nodes(prev);
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return (0);
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}
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void ft_free(void *ptr)
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{
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if (g_malloc_debug >= 1)
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DGSH("free called with addr", (long)ptr);
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if (g_malloc_debug >= 2)
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show_alloc_mem();
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if (ret_free(ptr) == 1)
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error_free_notalloc(ptr);
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if (g_malloc_debug >= 1)
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show_alloc_mem();
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}
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