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/*
* sysobj - https://github.com/bp0/verbose-spork
* Copyright (C) 2018 Burt P. <pburt0@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "auto_free.h"
#if (AF_USE_SYSOBJ)
#include "sysobj.h"
#else
#include <stdio.h>
#define sysobj_elapsed() af_elapsed()
#define sysobj_stats af_stats
static struct {
double auto_free_next;
unsigned long long
auto_freed,
auto_free_len;
} af_stats;
#endif
//Compatibility
#ifndef G_SOURCE_REMOVE
#define G_SOURCE_REMOVE FALSE
#endif
#ifndef G_SOURCE_CONTINUE
#define G_SOURCE_CONTINUE TRUE
#endif
static GMutex *free_lock = NULL;
static GSList *free_list = NULL;
static gboolean free_final = FALSE;
static GTimer *auto_free_timer = NULL;
static guint free_event_source = 0;
#define af_elapsed() (auto_free_timer ? g_timer_elapsed(auto_free_timer, NULL) : 0)
#define auto_free_msg(msg, ...) fprintf (stderr, "[%s] " msg "\n", __FUNCTION__, ##__VA_ARGS__) /**/
typedef struct {
gpointer ptr;
GThread *thread;
GDestroyNotify f_free;
double stamp;
const char *file;
int line;
const char *func;
} auto_free_item;
gboolean free_auto_free_sf(gpointer trash) {
(void)trash;
if (free_final) {
free_event_source = 0;
return G_SOURCE_REMOVE;
}
free_auto_free();
sysobj_stats.auto_free_next = sysobj_elapsed() + AF_SECONDS;
return G_SOURCE_CONTINUE;
}
gpointer auto_free_ex_(gpointer p, GDestroyNotify f, const char *file, int line, const char *func) {
if (!p) return p;
/* an auto_free() after free_auto_free_final()?
* Changed mind, I guess, just go with it. */
if (free_final)
free_final = FALSE;
if (!auto_free_timer) {
auto_free_timer = g_timer_new();
g_timer_start(auto_free_timer);
}
if (!free_event_source) {
/* if there is a main loop, then this will call
* free_auto_free() in idle time every AF_SECONDS seconds.
* If there is no main loop, then free_auto_free()
* will be called at sysobj_cleanup() and when exiting
* threads, as in sysobj_foreach(). */
free_event_source = g_timeout_add_seconds(AF_SECONDS, (GSourceFunc)free_auto_free_sf, NULL);
sysobj_stats.auto_free_next = sysobj_elapsed() + AF_SECONDS;
}
auto_free_item *z = g_new0(auto_free_item, 1);
z->ptr = p;
z->f_free = f;
z->thread = g_thread_self();
z->file = file;
z->line = line;
z->func = func;
z->stamp = af_elapsed();
#if GLIB_CHECK_VERSION(2,32,0)
if(free_lock==NULL) {free_lock=g_new(GMutex,1);g_mutex_init(free_lock);}
#else
if(free_lock==NULL) free_lock=g_mutex_new();
#endif
g_mutex_lock(free_lock);
free_list = g_slist_prepend(free_list, z);
sysobj_stats.auto_free_len++;
g_mutex_unlock(free_lock);
return p;
}
gpointer auto_free_on_exit_ex_(gpointer p, GDestroyNotify f, const char *file, int line, const char *func) {
if (!p) return p;
auto_free_item *z = g_new0(auto_free_item, 1);
z->ptr = p;
z->f_free = f;
z->thread = g_thread_self();
z->file = file;
z->line = line;
z->func = func;
z->stamp = -1.0;
#if GLIB_CHECK_VERSION(2,32,0)
if(free_lock==NULL) g_mutex_init(free_lock);
#else
if(free_lock==NULL) free_lock=g_mutex_new();
#endif
g_mutex_lock(free_lock);
free_list = g_slist_prepend(free_list, z);
sysobj_stats.auto_free_len++;
g_mutex_unlock(free_lock);
return p;
}
static struct { GDestroyNotify fptr; char *name; }
free_function_tab[] = {
{ (GDestroyNotify) g_free, "g_free" },
#if (AF_USE_SYSOBJ)
{ (GDestroyNotify) sysobj_free, "sysobj_free" },
{ (GDestroyNotify) class_free, "class_free" },
{ (GDestroyNotify) sysobj_filter_free, "sysobj_filter_free" },
{ (GDestroyNotify) sysobj_virt_free, "sysobj_virt_free" },
#endif
{ NULL, "(null)" },
};
static void free_auto_free_ex(gboolean thread_final) {
GThread *this_thread = g_thread_self();
GSList *l = NULL, *n = NULL;
long long unsigned fc = 0;
double now = af_elapsed();
if (!free_list) return;
#if GLIB_CHECK_VERSION(2,32,0)
if(free_lock==NULL) {free_lock=g_new(GMutex,1);g_mutex_init(free_lock);}
#else
if(free_lock==NULL) free_lock=g_mutex_new();
#endif
g_mutex_lock(free_lock);
if (DEBUG_AUTO_FREE)
auto_free_msg("%llu total items in queue, but will free from thread %p only... ", sysobj_stats.auto_free_len, this_thread);
for(l = free_list; l; l = n) {
auto_free_item *z = (auto_free_item*)l->data;
n = l->next;
if (!free_final && z->stamp < 0) continue;
double age = now - z->stamp;
if (free_final || (z->thread == this_thread && (thread_final || age > AF_DELAY_SECONDS) ) ) {
if (DEBUG_AUTO_FREE == 2) {
char fptr[128] = "", *fname;
for(int i = 0; i < (int)G_N_ELEMENTS(free_function_tab); i++)
if (z->f_free == free_function_tab[i].fptr)
fname = free_function_tab[i].name;
if (!fname) {
snprintf(fname, 127, "%p", z->f_free);
fname = fptr;
}
if (z->file || z->func)
auto_free_msg("free: %s(%p) age:%lfs from %s:%d %s()", fname, z->ptr, age, z->file, z->line, z->func);
else
auto_free_msg("free: %s(%p) age:%lfs", fname, z->ptr, age);
}
z->f_free(z->ptr);
g_free(z);
free_list = g_slist_delete_link(free_list, l);
fc++;
}
}
if (DEBUG_AUTO_FREE)
auto_free_msg("... freed %llu (from thread %p)", fc, this_thread);
sysobj_stats.auto_freed += fc;
sysobj_stats.auto_free_len -= fc;
g_mutex_unlock(free_lock);
}
void free_auto_free_thread_final() {
free_auto_free_ex(TRUE);
}
void free_auto_free_final() {
free_final = TRUE;
free_auto_free_ex(TRUE);
if (auto_free_timer)
g_timer_destroy(auto_free_timer);
auto_free_timer = NULL;
}
void free_auto_free() {
free_auto_free_ex(FALSE);
}
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