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refcount.h
Go to the documentation of this file.
1
57#ifndef JANUS_REFCOUNT_H
58#define JANUS_REFCOUNT_H
59
60#include <glib.h>
61#include "mutex.h"
62
63//~ #define REFCOUNT_DEBUG
64
65extern int refcount_debug;
66
72#define janus_refcount_containerof(refptr, type, member) \
73 ((type *)((char *)(refptr) - offsetof(type, member)))
74
75
80 gint count;
82 void (*free)(const janus_refcount *);
83};
84
85
86#ifdef REFCOUNT_DEBUG
87/* Reference counters debugging */
88extern GHashTable *counters;
89extern janus_mutex counters_mutex;
90#define janus_refcount_track(refp) { \
91 janus_mutex_lock(&counters_mutex); \
92 if(counters == NULL) \
93 counters = g_hash_table_new(NULL, NULL); \
94 g_hash_table_insert(counters, refp, refp); \
95 janus_mutex_unlock(&counters_mutex); \
96}
97#define janus_refcount_untrack(refp) { \
98 janus_mutex_lock(&counters_mutex); \
99 g_hash_table_remove(counters, refp); \
100 janus_mutex_unlock(&counters_mutex); \
101}
102#endif
103
104
111#define janus_refcount_init(refp, free_fn) { \
112 if(!refcount_debug) { \
113 janus_refcount_init_nodebug(refp, free_fn); \
114 } else { \
115 janus_refcount_init_debug(refp, free_fn); \
116 } \
117}
124#ifdef REFCOUNT_DEBUG
125#define janus_refcount_init_nodebug(refp, free_fn) { \
126 (refp)->count = 1; \
127 (refp)->free = free_fn; \
128 janus_refcount_track((refp)); \
129}
130#else
131#define janus_refcount_init_nodebug(refp, free_fn) { \
132 (refp)->count = 1; \
133 (refp)->free = free_fn; \
134}
135#endif
142#ifdef REFCOUNT_DEBUG
143#define janus_refcount_init_debug(refp, free_fn) { \
144 (refp)->count = 1; \
145 JANUS_PRINT("[%s:%s:%d:init] %p (%d)\n", __FILE__, __FUNCTION__, __LINE__, refp, (refp)->count); \
146 (refp)->free = free_fn; \
147 janus_refcount_track((refp)); \
148}
149#else
150#define janus_refcount_init_debug(refp, free_fn) { \
151 (refp)->count = 1; \
152 JANUS_PRINT("[%s:%s:%d:init] %p (%d)\n", __FILE__, __FUNCTION__, __LINE__, refp, (refp)->count); \
153 (refp)->free = free_fn; \
154}
155#endif
156
159#define janus_refcount_increase(refp) { \
160 if(!refcount_debug) { \
161 janus_refcount_increase_nodebug(refp); \
162 } else { \
163 janus_refcount_increase_debug(refp); \
164 } \
165}
168#define janus_refcount_increase_nodebug(refp) { \
169 g_atomic_int_inc((gint *)&(refp)->count); \
170}
173#define janus_refcount_increase_debug(refp) { \
174 JANUS_PRINT("[%s:%s:%d:increase] %p (%d)\n", __FILE__, __FUNCTION__, __LINE__, refp, (refp)->count+1); \
175 g_atomic_int_inc((gint *)&(refp)->count); \
176}
177
181#define janus_refcount_decrease(refp) { \
182 if(!refcount_debug) { \
183 janus_refcount_decrease_nodebug(refp); \
184 } else { \
185 janus_refcount_decrease_debug(refp); \
186 } \
187}
191#ifdef REFCOUNT_DEBUG
192#define janus_refcount_decrease_debug(refp) { \
193 JANUS_PRINT("[%s:%s:%d:decrease] %p (%d)\n", __FILE__, __FUNCTION__, __LINE__, refp, (refp)->count-1); \
194 if(g_atomic_int_dec_and_test((gint *)&(refp)->count)) { \
195 (refp)->free(refp); \
196 janus_refcount_untrack((refp)); \
197 } \
198}
199#else
200#define janus_refcount_decrease_debug(refp) { \
201 JANUS_PRINT("[%s:%s:%d:decrease] %p (%d)\n", __FILE__, __FUNCTION__, __LINE__, refp, (refp)->count-1); \
202 if(g_atomic_int_dec_and_test((gint *)&(refp)->count)) { \
203 (refp)->free(refp); \
204 } \
205}
206#endif
210#ifdef REFCOUNT_DEBUG
211#define janus_refcount_decrease_nodebug(refp) { \
212 if(g_atomic_int_dec_and_test((gint *)&(refp)->count)) { \
213 (refp)->free(refp); \
214 janus_refcount_untrack((refp)); \
215 } \
216}
217#else
218#define janus_refcount_decrease_nodebug(refp) { \
219 if(g_atomic_int_dec_and_test((gint *)&(refp)->count)) { \
220 (refp)->free(refp); \
221 } \
222}
223#endif
224
225#endif
Semaphores, Mutexes and Conditions.
GMutex janus_mutex
Janus mutex implementation.
Definition mutex.h:73
int refcount_debug
Definition janus.c:516
Definition refcount.h:78
gint count
The reference counter itself.
Definition refcount.h:80
void(* free)(const janus_refcount *)
Pointer to the function that will be used to free the object.
Definition refcount.h:82