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/**
* \file
* GC aware equivalente of g_ptr_array
*
* Author:
* Rodrigo Kumpera <rkumpera@novell.com>
*
* (C) 2010 Novell, Inc
*/
#ifndef __MONO_PTR_ARRAY_H__
#define __MONO_PTR_ARRAY_H__
#include <glib.h>
#include "mono/metadata/gc-internals.h"
/* This is an implementation of a growable pointer array that avoids doing memory allocations for small sizes.
* It works by allocating an initial small array on stack and only going to gc tracked memory if needed.
* The array elements are assumed to be object references.
*/
typedef struct {
void **data;
int size;
int capacity;
MonoGCRootSource source;
void *key;
const char *msg;
} MonoPtrArray;
#define MONO_PTR_ARRAY_MAX_ON_STACK (16)
#define mono_ptr_array_init(ARRAY, INITIAL_SIZE, SOURCE, KEY, MSG) do {\
(ARRAY).size = 0; \
(ARRAY).capacity = MAX (INITIAL_SIZE, MONO_PTR_ARRAY_MAX_ON_STACK); \
(ARRAY).source = SOURCE; \
(ARRAY).key = KEY; \
(ARRAY).msg = MSG; \
(ARRAY).data = INITIAL_SIZE > MONO_PTR_ARRAY_MAX_ON_STACK \
? (void **)mono_gc_alloc_fixed (sizeof (void*) * INITIAL_SIZE, mono_gc_make_root_descr_all_refs (INITIAL_SIZE), SOURCE, NULL, MSG) \
: g_newa (void*, MONO_PTR_ARRAY_MAX_ON_STACK); \
} while (0)
#define mono_ptr_array_destroy(ARRAY) do {\
if ((ARRAY).capacity > MONO_PTR_ARRAY_MAX_ON_STACK) \
mono_gc_free_fixed ((ARRAY).data); \
} while (0)
#define mono_ptr_array_append(ARRAY, VALUE) do { \
if ((ARRAY).size >= (ARRAY).capacity) {\
void **__tmp = (void **)mono_gc_alloc_fixed (sizeof (void*) * (ARRAY).capacity * 2, mono_gc_make_root_descr_all_refs ((ARRAY).capacity * 2), (ARRAY).source, (ARRAY).key, (ARRAY).msg); \
mono_gc_memmove_aligned ((void *)__tmp, (ARRAY).data, (ARRAY).capacity * sizeof (void*)); \
if ((ARRAY).capacity > MONO_PTR_ARRAY_MAX_ON_STACK) \
mono_gc_free_fixed ((ARRAY).data); \
(ARRAY).data = __tmp; \
(ARRAY).capacity *= 2;\
}\
((ARRAY).data [(ARRAY).size++] = VALUE); \
} while (0)
#define mono_ptr_array_sort(ARRAY, COMPARE_FUNC) do { \
qsort ((ARRAY).data, (ARRAY).size, sizeof (gpointer), (COMPARE_FUNC)); \
} while (0)
#define mono_ptr_array_set(ARRAY, IDX, VALUE) do { \
((ARRAY).data [(IDX)] = VALUE); \
} while (0)
#define mono_ptr_array_get(ARRAY, IDX) ((ARRAY).data [(IDX)])
#define mono_ptr_array_size(ARRAY) ((ARRAY).size)
#define mono_ptr_array_reset(ARRAY) do { \
(ARRAY).size = 0; \
} while (0)
#define mono_ptr_array_clear(ARRAY) do { \
(ARRAY).size = 0; \
mono_gc_bzero_aligned ((ARRAY).data, (ARRAY).capacity * sizeof (void*)); \
} while (0)
#endif