stats.c 23.4 KB
Newer Older
Jack Moffitt's avatar
Jack Moffitt committed
1 2 3 4 5
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>

Michael Smith's avatar
Michael Smith committed
6 7 8
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
Jack Moffitt's avatar
Jack Moffitt committed
9 10 11 12 13 14 15 16 17 18 19 20

#include <thread/thread.h>
#include <avl/avl.h>
#include <httpp/httpp.h>
#include <net/sock.h>

#include "connection.h"

#include "global.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
21
#include "xslt.h"
Jack Moffitt's avatar
Jack Moffitt committed
22

23
#ifdef _WIN32
24
#define vsnprintf _vsnprintf
25
#endif
Jack Moffitt's avatar
Jack Moffitt committed
26 27 28

typedef struct _event_listener_tag
{
29 30
    stats_event_t **queue;
    mutex_t *mutex;
Jack Moffitt's avatar
Jack Moffitt committed
31

32
    struct _event_listener_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
33 34
} event_listener_t;

Michael Smith's avatar
Michael Smith committed
35
int _stats_running = 0;
36
thread_type *_stats_thread_id;
37
int _stats_threads = 0;
Jack Moffitt's avatar
Jack Moffitt committed
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

stats_t _stats;
mutex_t _stats_mutex;

stats_event_t *_global_event_queue;
mutex_t _global_event_mutex;

cond_t _event_signal_cond;

event_listener_t *_event_listeners;



static void *_stats_thread(void *arg);
static int _compare_stats(void *a, void *b, void *arg);
static int _compare_source_stats(void *a, void *b, void *arg);
static int _free_stats(void *key);
static int _free_source_stats(void *key);
static void _add_event_to_queue(stats_event_t *event, stats_event_t **queue);
static stats_node_t *_find_node(avl_tree *tree, char *name);
static stats_source_t *_find_source(avl_tree *tree, char *source);
static void _free_event(stats_event_t *event);

void stats_initialize()
{
63
    _event_listeners = NULL;
64

65 66 67
    /* set up global struct */
    _stats.global_tree = avl_tree_new(_compare_stats, NULL);
    _stats.source_tree = avl_tree_new(_compare_source_stats, NULL);
Jack Moffitt's avatar
Jack Moffitt committed
68

69 70
    /* set up global mutex */
    thread_mutex_create(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
71

72 73
    /* set up event signaler */
    thread_cond_create(&_event_signal_cond);
Jack Moffitt's avatar
Jack Moffitt committed
74

75 76 77
    /* set up stats queues */
    _global_event_queue = NULL;
    thread_mutex_create(&_global_event_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
78

79 80 81
    /* fire off the stats thread */
    _stats_running = 1;
    _stats_thread_id = thread_create("Stats Thread", _stats_thread, NULL, THREAD_ATTACHED);
Jack Moffitt's avatar
Jack Moffitt committed
82 83 84 85
}

void stats_shutdown()
{
86
    int n;
87
    stats_event_t *event, *next;
Jack Moffitt's avatar
Jack Moffitt committed
88

89 90 91
    if(!_stats_running) /* We can't shutdown if we're not running. */
        return;

92 93 94
    /* wait for thread to exit */
    _stats_running = 0;
    thread_join(_stats_thread_id);
Jack Moffitt's avatar
Jack Moffitt committed
95

96 97 98 99 100 101 102
    /* wait for other threads to shut down */
    do {
        thread_sleep(300000);
        thread_mutex_lock(&_stats_mutex);
        n = _stats_threads;
        thread_mutex_unlock(&_stats_mutex);
    } while (n > 0);
103

104
    /* free the queues */
Jack Moffitt's avatar
Jack Moffitt committed
105

106 107
    /* destroy the queue mutexes */
    thread_mutex_destroy(&_global_event_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
108

109 110 111 112 113
    /* tear it all down */
    thread_cond_destroy(&_event_signal_cond);
    thread_mutex_destroy(&_stats_mutex);
    avl_tree_free(_stats.source_tree, _free_source_stats);
    avl_tree_free(_stats.global_tree, _free_stats);
114 115 116 117 118 119 120 121 122 123 124

    event = _global_event_queue;
    while(event) {
        if(event->source)
            free(event->source);
        if(event->value)
            free(event->value);
        next = event->next;
        free(event);
        event = next;
    }
Jack Moffitt's avatar
Jack Moffitt committed
125 126 127 128
}

stats_t *stats_get_stats()
{
129 130 131
    /* lock global stats
    
     copy stats
Jack Moffitt's avatar
Jack Moffitt committed
132

133
     unlock global stats
Jack Moffitt's avatar
Jack Moffitt committed
134

135
     return copied stats */
Jack Moffitt's avatar
Jack Moffitt committed
136

137
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
138 139 140 141
}

void stats_event(char *source, char *name, char *value)
{
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
    stats_event_t *node;
    stats_event_t *event;

    if (name == NULL || strcmp(name, "") == 0) return;

    /* build event */
    event = (stats_event_t *)malloc(sizeof(stats_event_t));
    event->source = NULL;
    if (source != NULL) event->source = (char *)strdup(source);
    event->name = (char *)strdup(name);
    event->value = NULL;
    event->next = NULL;
    if (value != NULL) event->value = (char *)strdup(value);

    /* queue event */
    thread_mutex_lock(&_global_event_mutex);
    if (_global_event_queue == NULL) {
        _global_event_queue = event;
    } else {
        node = _global_event_queue;
        while (node->next) node = node->next;
        node->next = event;
    }
    thread_mutex_unlock(&_global_event_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
166 167 168 169
}

void stats_event_args(char *source, char *name, char *format, ...)
{
170 171 172 173 174 175
    char buf[1024];
    va_list val;
    
    va_start(val, format);
    vsnprintf(buf, 1024, format, val);
    va_end(val);
Jack Moffitt's avatar
Jack Moffitt committed
176

177
    stats_event(source, name, buf);
Jack Moffitt's avatar
Jack Moffitt committed
178 179 180 181
}

static char *_get_stats(char *source, char *name)
{
182 183 184
    stats_node_t *stats = NULL;
    stats_source_t *src = NULL;
    char *value = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
185

186
    thread_mutex_lock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
187

188 189 190 191 192 193 194 195
    if (source == NULL) {
        stats = _find_node(_stats.global_tree, name);
    } else {
        src = _find_source(_stats.source_tree, source);
        if (src) {
            stats = _find_node(src->stats_tree, name);
        }
    }
Jack Moffitt's avatar
Jack Moffitt committed
196

197
    if (stats) value = (char *)strdup(stats->value);
Jack Moffitt's avatar
Jack Moffitt committed
198

199
    thread_mutex_unlock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
200

201
    return value;
Jack Moffitt's avatar
Jack Moffitt committed
202 203
}

204 205
char *stats_get_value(char *source, char *name)
{
206
    return(_get_stats(source, name));
207
}
Jack Moffitt's avatar
Jack Moffitt committed
208 209
void stats_event_inc(char *source, char *name)
{
210 211 212 213 214 215 216 217 218 219 220
    char *old_value;
    int new_value;
    
    old_value = _get_stats(source, name);
    if (old_value != NULL) {
        new_value = atoi(old_value);
        free(old_value);
        new_value++;
    } else {
        new_value = 1;
    }
Jack Moffitt's avatar
Jack Moffitt committed
221

222
    stats_event_args(source, name, "%d", new_value);
Jack Moffitt's avatar
Jack Moffitt committed
223 224 225 226
}

void stats_event_add(char *source, char *name, unsigned long value)
{
227 228
    char *old_value;
    unsigned long new_value;
Jack Moffitt's avatar
Jack Moffitt committed
229

230 231 232 233 234 235 236 237
    old_value = _get_stats(source, name);
    if (old_value != NULL) {
        new_value = atol(old_value);
        free(old_value);
        new_value += value;
    } else {
        new_value = value;
    }
Jack Moffitt's avatar
Jack Moffitt committed
238

239
    stats_event_args(source, name, "%ld", new_value);
Jack Moffitt's avatar
Jack Moffitt committed
240 241 242 243
}

void stats_event_dec(char *source, char *name)
{
244 245 246 247 248 249 250 251 252 253 254 255
    char *old_value;
    int new_value;

    old_value = _get_stats(source, name);
    if (old_value != NULL) {
        new_value = atoi(old_value);
        free(old_value);
        new_value--;
        if (new_value < 0) new_value = 0;
    } else {
        new_value = 0;
    }
Jack Moffitt's avatar
Jack Moffitt committed
256

257
    stats_event_args(source, name, "%d", new_value);
Jack Moffitt's avatar
Jack Moffitt committed
258 259 260 261 262 263 264
}

/* note: you must call this function only when you have exclusive access
** to the avl_tree
*/
static stats_node_t *_find_node(avl_tree *stats_tree, char *name)
{
265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
    stats_node_t *stats;
    avl_node *node;
    int cmp;

    /* get the root node */
    node = stats_tree->root->right;
    
    while (node) {
        stats = (stats_node_t *)node->key;
        cmp = strcmp(name, stats->name);
        if (cmp < 0) 
            node = node->left;
        else if (cmp > 0)
            node = node->right;
        else
            return stats;
    }
    
    /* didn't find it */
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
285 286 287 288 289 290 291
}

/* note: you must call this function only when you have exclusive access
** to the avl_tree
*/
static stats_source_t *_find_source(avl_tree *source_tree, char *source)
{
292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307
    stats_source_t *stats;
    avl_node *node;
    int cmp;

    /* get the root node */
    node = source_tree->root->right;
    while (node) {
        stats = (stats_source_t *)node->key;
        cmp = strcmp(source, stats->source);
        if (cmp < 0)
            node = node->left;
        else if (cmp > 0)
            node = node->right;
        else
            return stats;
    }
Jack Moffitt's avatar
Jack Moffitt committed
308

309 310
    /* didn't find it */
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
311 312 313 314
}

static stats_event_t *_copy_event(stats_event_t *event)
{
315 316 317 318 319 320 321 322 323 324 325
    stats_event_t *copy = (stats_event_t *)malloc(sizeof(stats_event_t));
    if (event->source) 
        copy->source = (char *)strdup(event->source);
    else
        copy->source = NULL;
    copy->name = (char *)strdup(event->name);
    if (event->value)
        copy->value = (char *)strdup(event->value);
    else
        copy->value = NULL;
    copy->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
326

327
    return copy;
Jack Moffitt's avatar
Jack Moffitt committed
328 329 330 331
}

static void *_stats_thread(void *arg)
{
332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453
    stats_event_t *event;
    stats_event_t *copy;
    stats_node_t *node;
    stats_node_t *anode;
    stats_source_t *snode;
    stats_source_t *asnode;
    event_listener_t *listener;
    avl_node *avlnode;

    while (_stats_running) {
        thread_mutex_lock(&_global_event_mutex);
        if (_global_event_queue != NULL) {
            /* grab the next event from the queue */
            event = _global_event_queue;
            _global_event_queue = event->next;
            event->next = NULL;
            thread_mutex_unlock(&_global_event_mutex);

            thread_mutex_lock(&_stats_mutex);
            if (event->source == NULL) {
                /* we have a global event */
                if (event->value != NULL) {
                    /* adding/updating */
                    node = _find_node(_stats.global_tree, event->name);
                    if (node == NULL) {
                        /* add node */
                        anode = (stats_node_t *)malloc(sizeof(stats_node_t));
                        anode->name = (char *)strdup(event->name);
                        anode->value = (char *)strdup(event->value);

                        avl_insert(_stats.global_tree, (void *)anode);
                    } else {
                        /* update node */
                        free(node->value);
                        node->value = (char *)strdup(event->value);
                    }

                } else {
                    /* we're deleting */
                    node = _find_node(_stats.global_tree, event->name);
                    if (node != NULL)
                        avl_delete(_stats.global_tree, (void *)node, _free_stats);
                }
            } else {
                /* we have a source event */

                snode = _find_source(_stats.source_tree, event->source);
                if (snode != NULL) {
                    /* this is a source we already have a tree for */
                    if (event->value != NULL) {
                        /* we're add/updating */
                        node = _find_node(snode->stats_tree, event->name);
                        if (node == NULL) {
                            /* adding node */
                            anode = (stats_node_t *)malloc(sizeof(stats_node_t));
                            anode->name = (char *)strdup(event->name);
                            anode->value = (char *)strdup(event->value);

                            avl_insert(snode->stats_tree, (void *)anode);
                        } else {
                            /* updating node */
                            free(node->value);
                            node->value = (char *)strdup(event->value);
                        }
                    } else {
                        /* we're deleting */
                        node = _find_node(snode->stats_tree, event->name);
                        if (node != NULL) {
                            avl_delete(snode->stats_tree, (void *)node, _free_stats);

                                avlnode = avl_get_first(snode->stats_tree);
                            if (avlnode == NULL) {
                                avl_delete(_stats.source_tree, (void *)snode, _free_source_stats);
                            }
                        }
                    }
                } else {
                    /* this is a new source */
                    asnode = (stats_source_t *)malloc(sizeof(stats_source_t));
                    asnode->source = (char *)strdup(event->source);
                    asnode->stats_tree = avl_tree_new(_compare_stats, NULL);

                    anode = (stats_node_t *)malloc(sizeof(stats_node_t));
                    anode->name = (char *)strdup(event->name);
                    anode->value = (char *)strdup(event->value);
                    
                    avl_insert(asnode->stats_tree, (void *)anode);

                    avl_insert(_stats.source_tree, (void *)asnode);
                }
            }
            
            /* now we have an event that's been processed into the running stats */
            /* this event should get copied to event listeners' queues */
            listener = _event_listeners;
            while (listener) {
                copy = _copy_event(event);
                thread_mutex_lock(listener->mutex);
                _add_event_to_queue(copy, listener->queue);
                thread_mutex_unlock(listener->mutex);

                listener = listener->next;
            }
            thread_cond_broadcast(&_event_signal_cond);

            /* now we need to destroy the event */
            _free_event(event);

            thread_mutex_unlock(&_stats_mutex);
        } else {
            thread_mutex_unlock(&_global_event_mutex);
        }

        thread_sleep(300000);
    }

    /* wake the other threads so they can shut down cleanly */
    thread_cond_broadcast(&_event_signal_cond);

    thread_exit(0);

    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
454 455 456 457 458
}

/* you must have the _stats_mutex locked here */
static void _register_listener(stats_event_t **queue, mutex_t *mutex)
{
459 460
    event_listener_t *node;
    event_listener_t *evli = (event_listener_t *)malloc(sizeof(event_listener_t));
Jack Moffitt's avatar
Jack Moffitt committed
461

462 463 464
    evli->queue = queue;
    evli->mutex = mutex;
    evli->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
465

466 467 468 469 470 471 472
    if (_event_listeners == NULL) {
        _event_listeners = evli;
    } else {
        node = _event_listeners;
        while (node->next) node = node->next;
        node->next = evli;
    }
Jack Moffitt's avatar
Jack Moffitt committed
473 474 475 476
}

static stats_event_t *_make_event_from_node(stats_node_t *node, char *source)
{
477 478 479 480 481 482 483 484 485
    stats_event_t *event = (stats_event_t *)malloc(sizeof(stats_event_t));
    
    if (source != NULL)
        event->source = (char *)strdup(source);
    else
        event->source = NULL;
    event->name = (char *)strdup(node->name);
    event->value = (char *)strdup(node->value);
    event->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
486

487
    return event;
Jack Moffitt's avatar
Jack Moffitt committed
488 489 490 491
}

static void _add_event_to_queue(stats_event_t *event, stats_event_t **queue)
{
492
    stats_event_t *node;
Jack Moffitt's avatar
Jack Moffitt committed
493

494 495 496 497 498 499 500
    if (*queue == NULL) {
        *queue = event;
    } else {
        node = *queue;
        while (node->next) node = node->next;
        node->next = event;
    }
Jack Moffitt's avatar
Jack Moffitt committed
501 502 503 504
}

static stats_event_t *_get_event_from_queue(stats_event_t **queue)
{
505
    stats_event_t *event;
Jack Moffitt's avatar
Jack Moffitt committed
506

507
    if (*queue == NULL) return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
508

509 510 511
    event = *queue;
    *queue = (*queue)->next;
    event->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
512

513
    return event;
Jack Moffitt's avatar
Jack Moffitt committed
514 515 516 517
}

static int _send_event_to_client(stats_event_t *event, connection_t *con)
{
518
    int ret;
Jack Moffitt's avatar
Jack Moffitt committed
519

520 521
    /* send data to the client!!!! */
    ret = sock_write(con->sock, "EVENT %s %s %s\n", (event->source != NULL) ? event->source : "global", event->name, event->value ? event->value : "null");
Jack Moffitt's avatar
Jack Moffitt committed
522

523
    return (ret == -1) ? 0 : 1;
Jack Moffitt's avatar
Jack Moffitt committed
524 525 526 527
}

void _dump_stats_to_queue(stats_event_t **queue)
{
528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558
    avl_node *node;
    avl_node *node2;
    stats_event_t *event;
    stats_source_t *source;

    thread_mutex_lock(&_stats_mutex);
    /* first we fill our queue with the current stats */
    /* start with the global stats */
    node = avl_get_first(_stats.global_tree);
    while (node) {
        event = _make_event_from_node((stats_node_t *)node->key, NULL);
        _add_event_to_queue(event, queue);

        node = avl_get_next(node);
    }

    /* now the stats for each source */
    node = avl_get_first(_stats.source_tree);
    while (node) {
        source = (stats_source_t *)node->key;
        node2 = avl_get_first(source->stats_tree);
        while (node2) {
            event = _make_event_from_node((stats_node_t *)node2->key, source->source);
            _add_event_to_queue(event, queue);

            node2 = avl_get_next(node2);
        }
        
        node = avl_get_next(node);
    }
    thread_mutex_unlock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
559 560
}

561 562 563 564 565 566
/* factoring out code for stats loops
** this function copies all stats to queue, and registers 
** the queue for all new events atomically.
** note: mutex must already be created!
*/
static void _atomic_get_and_register(stats_event_t **queue, mutex_t *mutex)
Jack Moffitt's avatar
Jack Moffitt committed
567
{
568 569 570 571
    avl_node *node;
    avl_node *node2;
    stats_event_t *event;
    stats_source_t *source;
Jack Moffitt's avatar
Jack Moffitt committed
572

573
    thread_mutex_lock(&_stats_mutex);
Jack Moffitt's avatar
Jack Moffitt committed
574

575 576 577 578 579 580 581
    /* first we fill our queue with the current stats */
    
    /* start with the global stats */
    node = avl_get_first(_stats.global_tree);
    while (node) {
        event = _make_event_from_node((stats_node_t *)node->key, NULL);
        _add_event_to_queue(event, queue);
Jack Moffitt's avatar
Jack Moffitt committed
582

583 584
        node = avl_get_next(node);
    }
Jack Moffitt's avatar
Jack Moffitt committed
585

586 587 588 589 590 591 592 593 594 595 596 597 598 599
    /* now the stats for each source */
    node = avl_get_first(_stats.source_tree);
    while (node) {
        source = (stats_source_t *)node->key;
        node2 = avl_get_first(source->stats_tree);
        while (node2) {
            event = _make_event_from_node((stats_node_t *)node2->key, source->source);
            _add_event_to_queue(event, queue);

            node2 = avl_get_next(node2);
        }
        
        node = avl_get_next(node);
    }
Jack Moffitt's avatar
Jack Moffitt committed
600

601 602
    /* now we register to receive future event notices */
    _register_listener(queue, mutex);
Jack Moffitt's avatar
Jack Moffitt committed
603

604
    thread_mutex_unlock(&_stats_mutex);
605 606 607 608
}

void *stats_connection(void *arg)
{
609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650
    stats_connection_t *statcon = (stats_connection_t *)arg;
    stats_event_t *local_event_queue = NULL;
    mutex_t local_event_mutex;
    stats_event_t *event;

    /* increment the thread count */
    thread_mutex_lock(&_stats_mutex);
    _stats_threads++;
    thread_mutex_unlock(&_stats_mutex);

    thread_mutex_create(&local_event_mutex);

    _atomic_get_and_register(&local_event_queue, &local_event_mutex);

    while (_stats_running) {
        thread_mutex_lock(&local_event_mutex);
        event = _get_event_from_queue(&local_event_queue);
        if (event != NULL) {
            if (!_send_event_to_client(event, statcon->con)) {
                _free_event(event);
                thread_mutex_unlock(&local_event_mutex);
                break;
            }
            _free_event(event);
        } else {
            thread_mutex_unlock(&local_event_mutex);
            thread_cond_wait(&_event_signal_cond);
            continue;
        }
                   
        thread_mutex_unlock(&local_event_mutex);
    }

    thread_mutex_destroy(&local_event_mutex);

    thread_mutex_lock(&_stats_mutex);
    _stats_threads--;
    thread_mutex_unlock(&_stats_mutex);

    thread_exit(0);
    
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
651 652
}

653 654 655 656 657 658 659
/* this function is primarily to support gui code needing to get stats updates
** create a thread with this as the start proc with an arg of the callback function
** on each stats event the callback will be called with the event
** and the callback is responsible for copying the data if it needs it after returning
*/
void *stats_callback(void *arg)
{
660
    void (*callback)(stats_event_t *event);
661

662 663
    stats_event_t *local_event_queue = NULL;
    mutex_t local_event_mutex;
664

665
    stats_event_t *event;
666

667
    callback = arg;
668

669 670 671
    thread_mutex_lock(&_stats_mutex);
    _stats_threads++;
    thread_mutex_unlock(&_stats_mutex);
672

673
    thread_mutex_create(&local_event_mutex);
674

675
    _atomic_get_and_register(&local_event_queue, &local_event_mutex);
676

677 678 679 680 681 682 683 684 685 686 687 688 689 690
    while (_stats_running) {
        thread_mutex_lock(&local_event_mutex);
        event = _get_event_from_queue(&local_event_queue);
        if (event != NULL) {
            callback(event);
            _free_event(event);
        } else {
            thread_mutex_unlock(&local_event_mutex);
            thread_cond_wait(&_event_signal_cond);
            continue;
        }
        
        thread_mutex_unlock(&local_event_mutex);
    }
691

692
    thread_mutex_destroy(&local_event_mutex);
693

694 695 696
    thread_mutex_lock(&_stats_mutex);
    _stats_threads--;
    thread_mutex_unlock(&_stats_mutex);
697

698
    thread_exit(0);
699

700
    return NULL;
701 702
}

Jack Moffitt's avatar
Jack Moffitt committed
703
typedef struct _source_xml_tag {
704 705
    char *mount;
    xmlNodePtr node;
Jack Moffitt's avatar
Jack Moffitt committed
706

707
    struct _source_xml_tag *next;
Jack Moffitt's avatar
Jack Moffitt committed
708 709 710 711
} source_xml_t;

static xmlNodePtr _find_xml_node(char *mount, source_xml_t **list, xmlNodePtr root)
{
712 713 714 715 716 717 718 719 720 721 722 723
    source_xml_t *node, *node2;
    int found = 0;

    /* search for existing node */
    node = *list;
    while (node) {
        if (strcmp(node->mount, mount) == 0) {
            found = 1;
            break;
        }
        node = node->next;
    }
Jack Moffitt's avatar
Jack Moffitt committed
724

725
    if (found) return node->node;
Jack Moffitt's avatar
Jack Moffitt committed
726

727
    /* if we didn't find it, we must build it and add it to the list */
Jack Moffitt's avatar
Jack Moffitt committed
728

729 730 731 732 733 734
    /* build node */
    node = (source_xml_t *)malloc(sizeof(source_xml_t));
    node->mount = strdup(mount);
    node->node = xmlNewChild(root, NULL, "source", NULL);
    xmlSetProp(node->node, "mount", mount);
    node->next = NULL;
Jack Moffitt's avatar
Jack Moffitt committed
735

736 737 738 739 740 741 742 743
    /* add node */
    if (*list == NULL) {
        *list = node;
    } else {
        node2 = *list;
        while (node2->next) node2 = node2->next;
        node2->next = node;
    }
Jack Moffitt's avatar
Jack Moffitt committed
744

745
    return node->node;
Jack Moffitt's avatar
Jack Moffitt committed
746 747
}

748 749 750 751 752 753
void stats_transform_xslt(client_t *client, char *xslpath)
{
    xmlDocPtr doc;

    stats_get_xml(&doc);

754
    xslt_transform(doc, xslpath, client);
755 756 757 758 759 760

    xmlFreeDoc(doc);
}

void stats_get_xml(xmlDocPtr *doc)
{
761 762 763 764 765
    stats_event_t *event;
    stats_event_t *queue;
    xmlNodePtr node, srcnode;
    source_xml_t *src_nodes = NULL;
    source_xml_t *next;
766

767 768
    queue = NULL;
    _dump_stats_to_queue(&queue);
769

770 771 772
    *doc = xmlNewDoc("1.0");
    node = xmlNewDocNode(*doc, NULL, "icestats", NULL);
    xmlDocSetRootElement(*doc, node);
773 774


775 776 777 778 779 780 781 782
    event = _get_event_from_queue(&queue);
    while (event) {
        if (event->source == NULL) {
            xmlNewChild(node, NULL, event->name, event->value);
        } else {
            srcnode = _find_xml_node(event->source, &src_nodes, node);
            xmlNewChild(srcnode, NULL, event->name, event->value);
        }
783

784 785 786
        _free_event(event);
        event = _get_event_from_queue(&queue);
    }
787

788 789 790 791 792 793
    while (src_nodes) {
        next = src_nodes->next;
        free(src_nodes->mount);
        free(src_nodes);
        src_nodes = next;
    }
794
}
Jack Moffitt's avatar
Jack Moffitt committed
795 796
void stats_sendxml(client_t *client)
{
797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840
    int bytes;
    stats_event_t *event;
    stats_event_t *queue;
    xmlDocPtr doc;
    xmlNodePtr node, srcnode;
    int len;
    char *buff = NULL;
    source_xml_t *snd;
    source_xml_t *src_nodes = NULL;

    queue = NULL;
    _dump_stats_to_queue(&queue);

    doc = xmlNewDoc("1.0");
    node = xmlNewDocNode(doc, NULL, "icestats", NULL);
    xmlDocSetRootElement(doc, node);


    event = _get_event_from_queue(&queue);
    while (event) {
        if (event->source == NULL) {
            xmlNewChild(node, NULL, event->name, event->value);
        } else {
            srcnode = _find_xml_node(event->source, &src_nodes, node);
            xmlNewChild(srcnode, NULL, event->name, event->value);
        }

        _free_event(event);
        event = _get_event_from_queue(&queue);
    }

    xmlDocDumpMemory(doc, (xmlChar **)&buff, &len);
    xmlFreeDoc(doc);
    
    client->respcode = 200;
    bytes = sock_write(client->con->sock, "HTTP/1.0 200 OK\r\n"
               "Content-Length: %d\r\n"
               "Content-Type: text/xml\r\n"
               "\r\n", len);
    if (bytes > 0) client->con->sent_bytes += bytes;
    else goto send_error;

    bytes = sock_write_bytes(client->con->sock, buff, len);
    if (bytes > 0) client->con->sent_bytes += bytes;
Jack Moffitt's avatar
Jack Moffitt committed
841 842

 send_error:
843 844 845 846 847 848 849
    while (src_nodes) {
        snd = src_nodes->next;
        free(src_nodes->mount);
        free(src_nodes);
        src_nodes = snd;
    }
    if (buff) xmlFree(buff);
Jack Moffitt's avatar
Jack Moffitt committed
850 851 852 853
}

static int _compare_stats(void *arg, void *a, void *b)
{
854 855
    stats_node_t *nodea = (stats_node_t *)a;
    stats_node_t *nodeb = (stats_node_t *)b;
Jack Moffitt's avatar
Jack Moffitt committed
856

857
    return strcmp(nodea->name, nodeb->name);
Jack Moffitt's avatar
Jack Moffitt committed
858 859 860 861
}

static int _compare_source_stats(void *arg, void *a, void *b)
{
862 863
    stats_source_t *nodea = (stats_source_t *)a;
    stats_source_t *nodeb = (stats_source_t *)b;
Jack Moffitt's avatar
Jack Moffitt committed
864

865
    return strcmp(nodea->source, nodeb->source);
Jack Moffitt's avatar
Jack Moffitt committed
866 867 868 869
}

static int _free_stats(void *key)
{
870 871 872 873 874 875
    stats_node_t *node = (stats_node_t *)key;
    free(node->value);
    free(node->name);
    free(node);
    
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
876 877 878 879
}

static int _free_source_stats(void *key)
{
880 881 882
    stats_source_t *node = (stats_source_t *)key;
    avl_tree_free(node->stats_tree, _free_stats);
    free(node->source);
883
    free(node);
Jack Moffitt's avatar
Jack Moffitt committed
884

885
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
886 887 888 889
}

static void _free_event(stats_event_t *event)
{
890 891 892 893
    if (event->source) free(event->source);
    if (event->name) free(event->name);
    if (event->value) free(event->value);
    free(event);
Jack Moffitt's avatar
Jack Moffitt committed
894
}