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owntone-server/src/cache.c

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/*
* Copyright (C) 2014 Espen Jürgensen <espenjurgensen@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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <stdint.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <string.h>
#include <pthread.h>
#include <event2/event.h>
#include <sqlite3.h>
#include "conffile.h"
#include "logger.h"
#include "httpd.h"
#include "httpd_daap.h"
#include "db.h"
#include "cache.h"
#include "listener.h"
#include "commands.h"
#define CACHE_VERSION 3
struct cache_arg
{
char *query; // daap query
char *ua; // user agent
int is_remote;
int msec;
const char *path; // artwork path
char *pathcopy; // copy of artwork path (for async operations)
int type; // individual or group artwork
int64_t persistentid;
int max_w;
int max_h;
int format;
time_t mtime;
int cached;
int del;
struct evbuffer *evbuf;
};
/* --- Globals --- */
// cache thread
static pthread_t tid_cache;
// Event base, pipes and events
struct event_base *evbase_cache;
static struct commands_base *cmdbase;
static struct event *cache_daap_updateev;
static int g_initialized;
// Global cache database handle
static sqlite3 *g_db_hdl;
static char *g_db_path;
// Global artwork stash
struct stash
{
char *path;
int format;
size_t size;
uint8_t *data;
} g_stash;
static int g_suspended;
// The user may configure a threshold (in msec), and queries slower than
// that will have their reply cached
static int g_cfg_threshold;
/* --------------------------------- HELPERS ------------------------------- */
/* The purpose of this function is to remove transient tags from a request
* url (query), eg remove session-id=xxx
*/
static void
remove_tag(char *in, const char *tag)
{
char *s;
char *e;
s = strstr(in, tag);
if (!s)
return;
e = strchr(s, '&');
if (e)
memmove(s, (e + 1), strlen(e + 1) + 1);
else if (s > in)
*(s - 1) = '\0';
}
/* --------------------------------- MAIN --------------------------------- */
/* Thread: cache */
static int
cache_create_tables(void)
{
#define T_REPLIES \
"CREATE TABLE IF NOT EXISTS replies (" \
" id INTEGER PRIMARY KEY NOT NULL," \
" query VARCHAR(4096) NOT NULL," \
" reply BLOB" \
");"
#define T_QUERIES \
"CREATE TABLE IF NOT EXISTS queries (" \
" id INTEGER PRIMARY KEY NOT NULL," \
" query VARCHAR(4096) UNIQUE NOT NULL," \
" user_agent VARCHAR(1024)," \
" is_remote INTEGER DEFAULT 0," \
" msec INTEGER DEFAULT 0," \
" timestamp INTEGER DEFAULT 0" \
");"
#define I_QUERY \
"CREATE INDEX IF NOT EXISTS idx_query ON replies (query);"
#define T_ARTWORK \
"CREATE TABLE IF NOT EXISTS artwork (" \
" id INTEGER PRIMARY KEY NOT NULL,"\
" type INTEGER NOT NULL DEFAULT 0," \
" persistentid INTEGER NOT NULL," \
" max_w INTEGER NOT NULL," \
" max_h INTEGER NOT NULL," \
" format INTEGER NOT NULL," \
" filepath VARCHAR(4096) NOT NULL," \
" db_timestamp INTEGER DEFAULT 0," \
" data BLOB" \
");"
#define I_ARTWORK_ID \
"CREATE INDEX IF NOT EXISTS idx_persistentidwh ON artwork(type, persistentid, max_w, max_h);"
#define I_ARTWORK_PATH \
"CREATE INDEX IF NOT EXISTS idx_pathtime ON artwork(filepath, db_timestamp);"
#define T_ADMIN_CACHE \
"CREATE TABLE IF NOT EXISTS admin_cache(" \
" key VARCHAR(32) PRIMARY KEY NOT NULL," \
" value VARCHAR(32) NOT NULL" \
");"
#define Q_CACHE_VERSION \
"INSERT INTO admin_cache (key, value) VALUES ('cache_version', '%d');"
char *query;
char *errmsg;
int ret;
// Create reply cache table
ret = sqlite3_exec(g_db_hdl, T_REPLIES, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error creating cache table 'replies': %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Create query table (the queries for which we will generate and cache replies)
ret = sqlite3_exec(g_db_hdl, T_QUERIES, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error creating cache table 'queries': %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Create index
ret = sqlite3_exec(g_db_hdl, I_QUERY, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error creating index on replies(query): %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Create artwork table
ret = sqlite3_exec(g_db_hdl, T_ARTWORK, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error creating cache table 'artwork': %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Create index
ret = sqlite3_exec(g_db_hdl, I_ARTWORK_ID, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error creating index on artwork(type, persistentid, max_w, max_h): %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
ret = sqlite3_exec(g_db_hdl, I_ARTWORK_PATH, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error creating index on artwork(filepath, db_timestamp): %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Create admin cache table
ret = sqlite3_exec(g_db_hdl, T_ADMIN_CACHE, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error creating cache table 'admin_cache': %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
query = sqlite3_mprintf(Q_CACHE_VERSION, CACHE_VERSION);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error inserting cache version: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
DPRINTF(E_DBG, L_CACHE, "Cache tables created\n");
return 0;
#undef T_REPLIES
#undef T_QUERIES
#undef I_QUERY
#undef T_ARTWORK
#undef I_ARTWORK_ID
#undef I_ARTWORK_PATH
#undef T_ADMIN_CACHE
#undef Q_CACHE_VERSION
}
static int
cache_drop_tables(void)
{
#define D_REPLIES "DROP TABLE IF EXISTS replies;"
#define D_QUERIES "DROP TABLE IF EXISTS queries;"
#define D_QUERY "DROP INDEX IF EXISTS idx_query;"
#define D_ARTWORK "DROP TABLE IF EXISTS artwork;"
#define D_ARTWORK_ID "DROP INDEX IF EXISTS idx_persistentidwh;"
#define D_ARTWORK_PATH "DROP INDEX IF EXISTS idx_pathtime;"
#define D_ADMIN_CACHE "DROP TABLE IF EXISTS admin_cache;"
#define Q_VACUUM "VACUUM;"
char *errmsg;
int ret;
// Drop reply cache table
ret = sqlite3_exec(g_db_hdl, D_REPLIES, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error dropping reply cache table: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Drop query table
ret = sqlite3_exec(g_db_hdl, D_QUERIES, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error dropping query table: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Drop index
ret = sqlite3_exec(g_db_hdl, D_QUERY, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error dropping query index: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Drop artwork table
ret = sqlite3_exec(g_db_hdl, D_ARTWORK, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error dropping artwork table: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Drop index
ret = sqlite3_exec(g_db_hdl, D_ARTWORK_ID, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error dropping artwork id index: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
ret = sqlite3_exec(g_db_hdl, D_ARTWORK_PATH, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error dropping artwork path index: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Drop admin cache table
ret = sqlite3_exec(g_db_hdl, D_ADMIN_CACHE, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_FATAL, L_CACHE, "Error dropping admin cache table: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
// Vacuum
ret = sqlite3_exec(g_db_hdl, Q_VACUUM, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error vacuuming cache database: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
DPRINTF(E_DBG, L_CACHE, "Cache tables dropped\n");
return 0;
#undef D_REPLIES
#undef D_QUERIES
#undef D_QUERY
#undef D_ARTWORK
#undef D_ARTWORK_ID
#undef D_ARTWORK_PATH
#undef D_ADMIN_CACHE
#undef Q_VACUUM
}
/*
* Compares the CACHE_VERSION against the version stored in the cache admin table.
* Drops the tables and indexes if the versions are different.
*
* @return 0 if versions are equal, 1 if versions are different or the admin table does not exist, -1 if an error occurred
*/
static int
cache_check_version(void)
{
#define Q_VER "SELECT value FROM admin_cache WHERE key = 'cache_version';"
sqlite3_stmt *stmt;
int cur_ver;
int ret;
DPRINTF(E_DBG, L_CACHE, "Running query '%s'\n", Q_VER);
ret = sqlite3_prepare_v2(g_db_hdl, Q_VER, strlen(Q_VER) + 1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_WARN, L_CACHE, "Could not prepare statement: %s\n", sqlite3_errmsg(g_db_hdl));
return 1;
}
ret = sqlite3_step(stmt);
if (ret != SQLITE_ROW)
{
DPRINTF(E_LOG, L_CACHE, "Could not step: %s\n", sqlite3_errmsg(g_db_hdl));
sqlite3_finalize(stmt);
return -1;
}
cur_ver = sqlite3_column_int(stmt, 0);
sqlite3_finalize(stmt);
if (cur_ver != CACHE_VERSION)
{
DPRINTF(E_LOG, L_CACHE, "Database schema outdated, deleting cache v%d -> v%d\n", cur_ver, CACHE_VERSION);
ret = cache_drop_tables();
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Error deleting database tables\n");
return -1;
}
return 1;
}
return 0;
#undef Q_VER
}
static int
cache_create(void)
{
#define Q_PRAGMA_CACHE_SIZE "PRAGMA cache_size=%d;"
#define Q_PRAGMA_JOURNAL_MODE "PRAGMA journal_mode=%s;"
#define Q_PRAGMA_SYNCHRONOUS "PRAGMA synchronous=%d;"
#define Q_PRAGMA_MMAP_SIZE "PRAGMA mmap_size=%d;"
char *errmsg;
int ret;
int cache_size;
char *journal_mode;
int synchronous;
int mmap_size;
char *query;
// Open db
ret = sqlite3_open(g_db_path, &g_db_hdl);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Could not open '%s': %s\n", g_db_path, sqlite3_errmsg(g_db_hdl));
sqlite3_close(g_db_hdl);
return -1;
}
// Check cache version
ret = cache_check_version();
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Could not check cache database version\n");
sqlite3_close(g_db_hdl);
return -1;
}
else if (ret > 0)
{
ret = cache_create_tables();
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Could not create cache database tables\n");
sqlite3_close(g_db_hdl);
return -1;
}
}
// Set page cache size in number of pages
cache_size = cfg_getint(cfg_getsec(cfg, "sqlite"), "pragma_cache_size_cache");
if (cache_size > -1)
{
query = sqlite3_mprintf(Q_PRAGMA_CACHE_SIZE, cache_size);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error setting pragma_cache_size_cache: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
}
// Set journal mode
journal_mode = cfg_getstr(cfg_getsec(cfg, "sqlite"), "pragma_journal_mode");
if (journal_mode)
{
query = sqlite3_mprintf(Q_PRAGMA_JOURNAL_MODE, journal_mode);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error setting pragma_journal_mode: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
}
// Set synchronous flag
synchronous = cfg_getint(cfg_getsec(cfg, "sqlite"), "pragma_synchronous");
if (synchronous > -1)
{
query = sqlite3_mprintf(Q_PRAGMA_SYNCHRONOUS, synchronous);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error setting pragma_synchronous: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
}
// Set mmap size
mmap_size = cfg_getint(cfg_getsec(cfg, "sqlite"), "pragma_mmap_size_cache");
if (synchronous > -1)
{
query = sqlite3_mprintf(Q_PRAGMA_MMAP_SIZE, mmap_size);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error setting pragma_mmap_size: %s\n", errmsg);
sqlite3_free(errmsg);
sqlite3_close(g_db_hdl);
return -1;
}
}
DPRINTF(E_DBG, L_CACHE, "Cache created\n");
return 0;
#undef Q_PRAGMA_CACHE_SIZE
#undef Q_PRAGMA_JOURNAL_MODE
#undef Q_PRAGMA_SYNCHRONOUS
#undef Q_PRAGMA_MMAP_SIZE
}
static void
cache_close(void)
{
sqlite3_stmt *stmt;
if (!g_db_hdl)
return;
/* Tear down anything that's in flight */
while ((stmt = sqlite3_next_stmt(g_db_hdl, 0)))
sqlite3_finalize(stmt);
sqlite3_close(g_db_hdl);
DPRINTF(E_DBG, L_CACHE, "Cache closed\n");
}
/* Adds the reply (stored in evbuf) to the cache */
static int
cache_daap_reply_add(const char *query, struct evbuffer *evbuf)
{
#define Q_TMPL "INSERT INTO replies (query, reply) VALUES (?, ?);"
sqlite3_stmt *stmt;
unsigned char *data;
size_t datalen;
int ret;
datalen = evbuffer_get_length(evbuf);
data = evbuffer_pullup(evbuf, -1);
ret = sqlite3_prepare_v2(g_db_hdl, Q_TMPL, -1, &stmt, 0);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error preparing query for cache update: %s\n", sqlite3_errmsg(g_db_hdl));
return -1;
}
sqlite3_bind_text(stmt, 1, query, -1, SQLITE_STATIC);
sqlite3_bind_blob(stmt, 2, data, datalen, SQLITE_STATIC);
ret = sqlite3_step(stmt);
if (ret != SQLITE_DONE)
{
DPRINTF(E_LOG, L_CACHE, "Error stepping query for cache update: %s\n", sqlite3_errmsg(g_db_hdl));
sqlite3_finalize(stmt);
return -1;
}
ret = sqlite3_finalize(stmt);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error finalizing query for cache update: %s\n", sqlite3_errmsg(g_db_hdl));
return -1;
}
//DPRINTF(E_DBG, L_CACHE, "Wrote cache reply, size %d\n", datalen);
return 0;
#undef Q_TMPL
}
/* Adds the query to the list of queries for which we will build and cache a reply */
static enum command_state
cache_daap_query_add(void *arg, int *retval)
{
#define Q_TMPL "INSERT OR REPLACE INTO queries (user_agent, is_remote, query, msec, timestamp) VALUES ('%q', %d, '%q', %d, %" PRIi64 ");"
#define Q_CLEANUP "DELETE FROM queries WHERE id NOT IN (SELECT id FROM queries ORDER BY timestamp DESC LIMIT 20);"
struct cache_arg *cmdarg;
struct timeval delay = { 60, 0 };
char *query;
char *errmsg;
int ret;
cmdarg = arg;
if (!cmdarg->ua)
{
DPRINTF(E_LOG, L_CACHE, "Couldn't add slow query to cache, unknown user-agent\n");
goto error_add;
}
// Currently we are only able to pre-build and cache these reply types
if ( (strncmp(cmdarg->query, "/databases/1/containers/", strlen("/databases/1/containers/")) != 0) &&
(strncmp(cmdarg->query, "/databases/1/groups?", strlen("/databases/1/groups?")) != 0) &&
(strncmp(cmdarg->query, "/databases/1/items?", strlen("/databases/1/items?")) != 0) &&
(strncmp(cmdarg->query, "/databases/1/browse/", strlen("/databases/1/browse/")) != 0) )
goto error_add;
remove_tag(cmdarg->query, "session-id");
remove_tag(cmdarg->query, "revision-number");
query = sqlite3_mprintf(Q_TMPL, cmdarg->ua, cmdarg->is_remote, cmdarg->query, cmdarg->msec, (int64_t)time(NULL));
if (!query)
{
DPRINTF(E_LOG, L_CACHE, "Out of memory making query string.\n");
goto error_add;
}
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error adding query to query list: %s\n", errmsg);
sqlite3_free(errmsg);
goto error_add;
}
DPRINTF(E_INFO, L_CACHE, "Slow query (%d ms) added to cache: '%s' (user-agent: '%s')\n", cmdarg->msec, cmdarg->query, cmdarg->ua);
free(cmdarg->ua);
free(cmdarg->query);
// Limits the size of the cache to only contain replies for 20 most recent queries
ret = sqlite3_exec(g_db_hdl, Q_CLEANUP, NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error cleaning up query list before update: %s\n", errmsg);
sqlite3_free(errmsg);
*retval = -1;
return COMMAND_END;
}
// Will set of cache regeneration after waiting a bit (so there is less risk
// of disturbing the user)
evtimer_add(cache_daap_updateev, &delay);
*retval = 0;
return COMMAND_END;
error_add:
if (cmdarg->ua)
free(cmdarg->ua);
if (cmdarg->query)
free(cmdarg->query);
*retval = -1;
return COMMAND_END;
#undef Q_CLEANUP
#undef Q_TMPL
}
// Gets a reply from the cache.
// cmdarg->evbuf will be filled with the reply (gzipped)
static enum command_state
cache_daap_query_get(void *arg, int *retval)
{
#define Q_TMPL "SELECT reply FROM replies WHERE query = ?;"
struct cache_arg *cmdarg;
sqlite3_stmt *stmt;
char *query;
int datalen;
int ret;
cmdarg = arg;
query = cmdarg->query;
remove_tag(query, "session-id");
remove_tag(query, "revision-number");
// Look in the DB
ret = sqlite3_prepare_v2(g_db_hdl, Q_TMPL, -1, &stmt, 0);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error preparing query for cache update: %s\n", sqlite3_errmsg(g_db_hdl));
free(query);
*retval = -1;
return COMMAND_END;
}
sqlite3_bind_text(stmt, 1, query, -1, SQLITE_STATIC);
ret = sqlite3_step(stmt);
if (ret != SQLITE_ROW)
{
if (ret != SQLITE_DONE)
DPRINTF(E_LOG, L_CACHE, "Error stepping query for cache update: %s\n", sqlite3_errmsg(g_db_hdl));
goto error_get;
}
datalen = sqlite3_column_bytes(stmt, 0);
if (!cmdarg->evbuf)
{
DPRINTF(E_LOG, L_CACHE, "Error: DAAP reply evbuffer is NULL\n");
goto error_get;
}
ret = evbuffer_add(cmdarg->evbuf, sqlite3_column_blob(stmt, 0), datalen);
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Out of memory for DAAP reply evbuffer\n");
goto error_get;
}
ret = sqlite3_finalize(stmt);
if (ret != SQLITE_OK)
DPRINTF(E_LOG, L_CACHE, "Error finalizing query for getting cache: %s\n", sqlite3_errmsg(g_db_hdl));
DPRINTF(E_INFO, L_CACHE, "Cache hit: %s\n", query);
free(query);
*retval = 0;
return COMMAND_END;
error_get:
sqlite3_finalize(stmt);
free(query);
*retval = -1;
return COMMAND_END;
#undef Q_TMPL
}
/* Removes the query from the cache */
static int
cache_daap_query_delete(const int id)
{
#define Q_TMPL "DELETE FROM queries WHERE id = %d;"
char *query;
char *errmsg;
int ret;
query = sqlite3_mprintf(Q_TMPL, id);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error deleting query from cache: %s\n", errmsg);
sqlite3_free(errmsg);
return -1;
}
return 0;
#undef Q_TMPL
}
/* Here we actually update the cache by asking httpd_daap for responses
* to the queries set for caching
*/
static void
cache_daap_update_cb(int fd, short what, void *arg)
{
sqlite3_stmt *stmt;
struct evbuffer *evbuf;
struct evbuffer *gzbuf;
char *errmsg;
char *query;
int ret;
if (g_suspended)
{
DPRINTF(E_DBG, L_CACHE, "Got a request to update DAAP cache while suspended\n");
return;
}
DPRINTF(E_LOG, L_CACHE, "Beginning DAAP cache update\n");
ret = sqlite3_exec(g_db_hdl, "DELETE FROM replies;", NULL, NULL, &errmsg);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error clearing reply cache before update: %s\n", errmsg);
sqlite3_free(errmsg);
return;
}
ret = sqlite3_prepare_v2(g_db_hdl, "SELECT id, user_agent, is_remote, query FROM queries;", -1, &stmt, 0);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error preparing for cache update: %s\n", sqlite3_errmsg(g_db_hdl));
return;
}
while ((ret = sqlite3_step(stmt)) == SQLITE_ROW)
{
query = strdup((char *)sqlite3_column_text(stmt, 3));
evbuf = daap_reply_build(query, (char *)sqlite3_column_text(stmt, 1), sqlite3_column_int(stmt, 2));
if (!evbuf)
{
DPRINTF(E_LOG, L_CACHE, "Error building DAAP reply for query: %s\n", query);
cache_daap_query_delete(sqlite3_column_int(stmt, 0));
free(query);
continue;
}
gzbuf = httpd_gzip_deflate(evbuf);
if (!gzbuf)
{
DPRINTF(E_LOG, L_CACHE, "Error gzipping DAAP reply for query: %s\n", query);
cache_daap_query_delete(sqlite3_column_int(stmt, 0));
free(query);
evbuffer_free(evbuf);
continue;
}
evbuffer_free(evbuf);
cache_daap_reply_add(query, gzbuf);
free(query);
evbuffer_free(gzbuf);
}
if (ret != SQLITE_DONE)
DPRINTF(E_LOG, L_CACHE, "Could not step: %s\n", sqlite3_errmsg(g_db_hdl));
sqlite3_finalize(stmt);
DPRINTF(E_LOG, L_CACHE, "DAAP cache updated\n");
}
/* Sets off an update by activating the event. The delay is because we are low
* priority compared to other listeners of database updates.
*/
static enum command_state
cache_daap_update(void *arg, int *retval)
{
struct timeval delay = { 10, 0 };
*retval = event_add(cache_daap_updateev, &delay);
return COMMAND_END;
}
/* Callback from filescanner thread */
static void
cache_daap_listener_cb(short event_mask)
{
commands_exec_async(cmdbase, cache_daap_update, NULL);
}
/*
* Updates cached timestamps to current time for all cache entries for the given path, if the file was not modfied
* after the cached timestamp. All cache entries for the given path are deleted, if the file was
* modified after the cached timestamp.
*
* @param cmdarg->pathcopy the full path to the artwork file (could be an jpg/png image or a media file with embedded artwork)
* @param cmdarg->mtime modified timestamp of the artwork file
* @return 0 if successful, -1 if an error occurred
*/
static enum command_state
cache_artwork_ping_impl(void *arg, int *retval)
{
#define Q_TMPL_PING "UPDATE artwork SET db_timestamp = %" PRIi64 " WHERE filepath = '%q' AND db_timestamp >= %" PRIi64 ";"
#define Q_TMPL_DEL "DELETE FROM artwork WHERE filepath = '%q' AND db_timestamp < %" PRIi64 ";"
struct cache_arg *cmdarg;
char *query;
char *errmsg;
int ret;
cmdarg = arg;
query = sqlite3_mprintf(Q_TMPL_PING, (int64_t)time(NULL), cmdarg->pathcopy, (int64_t)cmdarg->mtime);
DPRINTF(E_DBG, L_CACHE, "Running query '%s'\n", query);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Query error: %s\n", errmsg);
goto error_ping;
}
if (cmdarg->del > 0)
{
query = sqlite3_mprintf(Q_TMPL_DEL, cmdarg->pathcopy, (int64_t)cmdarg->mtime);
DPRINTF(E_DBG, L_CACHE, "Running query '%s'\n", query);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Query error: %s\n", errmsg);
goto error_ping;
}
}
free(cmdarg->pathcopy);
*retval = 0;
return COMMAND_END;
error_ping:
sqlite3_free(errmsg);
free(cmdarg->pathcopy);
*retval = -1;
return COMMAND_END;
#undef Q_TMPL_PING
#undef Q_TMPL_DEL
}
/*
* Removes all cache entries for the given path
*
* @param cmdarg->path the full path to the artwork file (could be an jpg/png image or a media file with embedded artwork)
* @return 0 if successful, -1 if an error occurred
*/
static enum command_state
cache_artwork_delete_by_path_impl(void *arg, int *retval)
{
#define Q_TMPL_DEL "DELETE FROM artwork WHERE filepath = '%q';"
struct cache_arg *cmdarg;
char *query;
char *errmsg;
int ret;
cmdarg = arg;
query = sqlite3_mprintf(Q_TMPL_DEL, cmdarg->path);
DPRINTF(E_DBG, L_CACHE, "Running query '%s'\n", query);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Query error: %s\n", errmsg);
sqlite3_free(errmsg);
*retval = -1;
return COMMAND_END;
}
DPRINTF(E_DBG, L_CACHE, "Deleted %d rows\n", sqlite3_changes(g_db_hdl));
*retval = 0;
return COMMAND_END;
#undef Q_TMPL_DEL
}
/*
* Removes all cache entries with cached timestamp older than the given reference timestamp
*
* @param cmdarg->mtime reference timestamp
* @return 0 if successful, -1 if an error occurred
*/
static enum command_state
cache_artwork_purge_cruft_impl(void *arg, int *retval)
{
#define Q_TMPL "DELETE FROM artwork WHERE db_timestamp < %" PRIi64 ";"
struct cache_arg *cmdarg;
char *query;
char *errmsg;
int ret;
cmdarg = arg;
query = sqlite3_mprintf(Q_TMPL, (int64_t)cmdarg->mtime);
DPRINTF(E_DBG, L_CACHE, "Running purge query '%s'\n", query);
ret = sqlite3_exec(g_db_hdl, query, NULL, NULL, &errmsg);
sqlite3_free(query);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Query error: %s\n", errmsg);
sqlite3_free(errmsg);
*retval = -1;
return COMMAND_END;
}
DPRINTF(E_DBG, L_CACHE, "Purged %d rows\n", sqlite3_changes(g_db_hdl));
*retval = 0;
return COMMAND_END;
#undef Q_TMPL
}
/*
* Adds the given (scaled) artwork image to the artwork cache
*
* @param cmdarg->persistentid persistent songalbumid or songartistid
* @param cmdarg->max_w maximum image width
* @param cmdarg->max_h maximum image height
* @param cmdarg->format ART_FMT_PNG for png, ART_FMT_JPEG for jpeg or 0 if no artwork available
* @param cmdarg->filename the full path to the artwork file (could be an jpg/png image or a media file with embedded artwork) or empty if no artwork available
* @param cmdarg->evbuf event buffer containing the (scaled) image
* @return 0 if successful, -1 if an error occurred
*/
static enum command_state
cache_artwork_add_impl(void *arg, int *retval)
{
struct cache_arg *cmdarg;
sqlite3_stmt *stmt;
char *query;
uint8_t *data;
int datalen;
int ret;
cmdarg = arg;
query = "INSERT INTO artwork (id, persistentid, max_w, max_h, format, filepath, db_timestamp, data, type) VALUES (NULL, ?, ?, ?, ?, ?, ?, ?, ?);";
ret = sqlite3_prepare_v2(g_db_hdl, query, -1, &stmt, 0);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Could not prepare statement: %s\n", sqlite3_errmsg(g_db_hdl));
*retval = -1;
return COMMAND_END;
}
datalen = evbuffer_get_length(cmdarg->evbuf);
data = evbuffer_pullup(cmdarg->evbuf, -1);
sqlite3_bind_int64(stmt, 1, cmdarg->persistentid);
sqlite3_bind_int(stmt, 2, cmdarg->max_w);
sqlite3_bind_int(stmt, 3, cmdarg->max_h);
sqlite3_bind_int(stmt, 4, cmdarg->format);
sqlite3_bind_text(stmt, 5, cmdarg->path, -1, SQLITE_STATIC);
sqlite3_bind_int(stmt, 6, (uint64_t)time(NULL));
sqlite3_bind_blob(stmt, 7, data, datalen, SQLITE_STATIC);
sqlite3_bind_int(stmt, 8, cmdarg->type);
ret = sqlite3_step(stmt);
if (ret != SQLITE_DONE)
{
DPRINTF(E_LOG, L_CACHE, "Error stepping query for artwork add: %s\n", sqlite3_errmsg(g_db_hdl));
sqlite3_finalize(stmt);
*retval = -1;
return COMMAND_END;
}
ret = sqlite3_finalize(stmt);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Error finalizing query for artwork add: %s\n", sqlite3_errmsg(g_db_hdl));
*retval = -1;
return COMMAND_END;
}
*retval = 0;
return COMMAND_END;
}
/*
* Get the cached artwork image for the given persistentid and maximum width/height
*
* If there is a cached entry for the given id and width/height, the parameter cached is set to 1.
* In this case format and data contain the cached values.
*
* @param cmdarg->type individual or group artwork
* @param cmdarg->persistentid persistent itemid, songalbumid or songartistid
* @param cmdarg->max_w maximum image width
* @param cmdarg->max_h maximum image height
* @param cmdarg->cached set by this function to 0 if no cache entry exists, otherwise 1
* @param cmdarg->format set by this function to the format of the cache entry
* @param cmdarg->evbuf event buffer filled by this function with the scaled image
* @return 0 if successful, -1 if an error occurred
*/
static enum command_state
cache_artwork_get_impl(void *arg, int *retval)
{
#define Q_TMPL "SELECT a.format, a.data FROM artwork a WHERE a.type = %d AND a.persistentid = %" PRIi64 " AND a.max_w = %d AND a.max_h = %d;"
struct cache_arg *cmdarg;
sqlite3_stmt *stmt;
char *query;
int datalen;
int ret;
cmdarg = arg;
query = sqlite3_mprintf(Q_TMPL, cmdarg->type, cmdarg->persistentid, cmdarg->max_w, cmdarg->max_h);
if (!query)
{
DPRINTF(E_LOG, L_CACHE, "Out of memory for query string\n");
*retval = -1;
return COMMAND_END;
}
DPRINTF(E_DBG, L_CACHE, "Running query '%s'\n", query);
ret = sqlite3_prepare_v2(g_db_hdl, query, -1, &stmt, 0);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_CACHE, "Could not prepare statement: %s\n", sqlite3_errmsg(g_db_hdl));
ret = -1;
goto error_get;
}
ret = sqlite3_step(stmt);
if (ret != SQLITE_ROW)
{
cmdarg->cached = 0;
if (ret == SQLITE_DONE)
{
ret = 0;
DPRINTF(E_DBG, L_CACHE, "No results\n");
}
else
{
ret = -1;
DPRINTF(E_LOG, L_CACHE, "Could not step: %s\n", sqlite3_errmsg(g_db_hdl));
}
goto error_get;
}
cmdarg->format = sqlite3_column_int(stmt, 0);
datalen = sqlite3_column_bytes(stmt, 1);
if (!cmdarg->evbuf)
{
DPRINTF(E_LOG, L_CACHE, "Error: Artwork evbuffer is NULL\n");
ret = -1;
goto error_get;
}
ret = evbuffer_add(cmdarg->evbuf, sqlite3_column_blob(stmt, 1), datalen);
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Out of memory for artwork evbuffer\n");
ret = -1;
goto error_get;
}
cmdarg->cached = 1;
ret = sqlite3_finalize(stmt);
if (ret != SQLITE_OK)
DPRINTF(E_LOG, L_CACHE, "Error finalizing query for getting cache: %s\n", sqlite3_errmsg(g_db_hdl));
DPRINTF(E_DBG, L_CACHE, "Cache hit: %s\n", query);
sqlite3_free(query);
*retval = 0;
return COMMAND_END;
error_get:
sqlite3_finalize(stmt);
sqlite3_free(query);
*retval = ret;
return COMMAND_END;
#undef Q_TMPL
}
static enum command_state
cache_artwork_stash_impl(void *arg, int *retval)
{
struct cache_arg *cmdarg;
cmdarg = arg;
// Clear current stash
if (g_stash.path)
{
free(g_stash.path);
free(g_stash.data);
memset(&g_stash, 0, sizeof(struct stash));
}
// If called with no evbuf then we are done, we just needed to clear the stash
if (!cmdarg->evbuf)
{
*retval = 0;
return COMMAND_END;
}
g_stash.size = evbuffer_get_length(cmdarg->evbuf);
g_stash.data = malloc(g_stash.size);
if (!g_stash.data)
{
DPRINTF(E_LOG, L_CACHE, "Out of memory for artwork stash data\n");
*retval = -1;
return COMMAND_END;
}
g_stash.path = strdup(cmdarg->path);
if (!g_stash.path)
{
DPRINTF(E_LOG, L_CACHE, "Out of memory for artwork stash path\n");
free(g_stash.data);
*retval = -1;
return COMMAND_END;
}
g_stash.format = cmdarg->format;
*retval = evbuffer_copyout(cmdarg->evbuf, g_stash.data, g_stash.size);
return COMMAND_END;
}
static enum command_state
cache_artwork_read_impl(void *arg, int *retval)
{
struct cache_arg *cmdarg;
cmdarg = arg;
cmdarg->format = 0;
if (!g_stash.path || !g_stash.data || (strcmp(g_stash.path, cmdarg->path) != 0))
{
*retval = -1;
return COMMAND_END;
}
cmdarg->format = g_stash.format;
DPRINTF(E_DBG, L_CACHE, "Stash hit (format %d, size %zu): %s\n", g_stash.format, g_stash.size, g_stash.path);
*retval = evbuffer_add(cmdarg->evbuf, g_stash.data, g_stash.size);
return COMMAND_END;
}
static void *
cache(void *arg)
{
int ret;
ret = cache_create();
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Error: Cache create failed. Cache will be disabled.\n");
pthread_exit(NULL);
}
/* The thread needs a connection with the main db, so it can generate DAAP
* replies through httpd_daap.c
*/
ret = db_perthread_init();
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Error: DB init failed. Cache will be disabled.\n");
cache_close();
pthread_exit(NULL);
}
g_initialized = 1;
event_base_dispatch(evbase_cache);
if (g_initialized)
{
DPRINTF(E_LOG, L_CACHE, "Cache event loop terminated ahead of time!\n");
g_initialized = 0;
}
db_perthread_deinit();
cache_close();
pthread_exit(NULL);
}
/* ---------------------------- DAAP cache API --------------------------- */
/* The DAAP cache will cache raw daap replies for queries added with
* cache_daap_add(). Only some query types are supported.
* You can't add queries where the canonical reply is not HTTP_OK, because
* daap_request will use that as default for cache replies.
*
*/
void
cache_daap_suspend(void)
{
g_suspended = 1;
}
void
cache_daap_resume(void)
{
g_suspended = 0;
}
int
cache_daap_get(struct evbuffer *evbuf, const char *query)
{
struct cache_arg cmdarg;
if (!g_initialized)
return -1;
cmdarg.query = strdup(query);
cmdarg.evbuf = evbuf;
return commands_exec_sync(cmdbase, cache_daap_query_get, NULL, &cmdarg);
}
void
cache_daap_add(const char *query, const char *ua, int is_remote, int msec)
{
struct cache_arg *cmdarg;
if (!g_initialized)
return;
cmdarg = calloc(1, sizeof(struct cache_arg));
if (!cmdarg)
{
DPRINTF(E_LOG, L_CACHE, "Could not allocate cache_arg\n");
return;
}
cmdarg->query = strdup(query);
cmdarg->ua = strdup(ua);
cmdarg->is_remote = is_remote;
cmdarg->msec = msec;
commands_exec_async(cmdbase, cache_daap_query_add, cmdarg);
}
int
cache_daap_threshold(void)
{
return g_cfg_threshold;
}
/* --------------------------- Artwork cache API -------------------------- */
/*
* Updates cached timestamps to current time for all cache entries for the given path, if the file was not modfied
* after the cached timestamp.
*
* If the parameter "del" is greater than 0, all cache entries for the given path are deleted, if the file was
* modified after the cached timestamp.
*
* @param path the full path to the artwork file (could be an jpg/png image or a media file with embedded artwork)
* @param mtime modified timestamp of the artwork file
* @param del if > 0 cached entries for the given path are deleted if the cached timestamp (db_timestamp) is older than mtime
* @return 0 if successful, -1 if an error occurred
*/
void
cache_artwork_ping(const char *path, time_t mtime, int del)
{
struct cache_arg *cmdarg;
if (!g_initialized)
return;
cmdarg = calloc(1, sizeof(struct cache_arg));
if (!cmdarg)
{
DPRINTF(E_LOG, L_CACHE, "Could not allocate cache_arg\n");
return;
}
cmdarg->pathcopy = strdup(path);
cmdarg->mtime = mtime;
cmdarg->del = del;
commands_exec_async(cmdbase, cache_artwork_ping_impl, cmdarg);
}
/*
* Removes all cache entries for the given path
*
* @param path the full path to the artwork file (could be an jpg/png image or a media file with embedded artwork)
* @return 0 if successful, -1 if an error occurred
*/
int
cache_artwork_delete_by_path(const char *path)
{
struct cache_arg cmdarg;
if (!g_initialized)
return -1;
cmdarg.path = path;
return commands_exec_sync(cmdbase, cache_artwork_delete_by_path_impl, NULL, &cmdarg);
}
/*
* Removes all cache entries with cached timestamp older than the given reference timestamp
*
* @param ref reference timestamp
* @return 0 if successful, -1 if an error occurred
*/
int
cache_artwork_purge_cruft(time_t ref)
{
struct cache_arg cmdarg;
if (!g_initialized)
return -1;
cmdarg.mtime = ref;
return commands_exec_sync(cmdbase, cache_artwork_purge_cruft_impl, NULL, &cmdarg);
}
/*
* Adds the given (scaled) artwork image to the artwork cache
*
* @param type individual or group artwork
* @param persistentid persistent itemid, songalbumid or songartistid
* @param max_w maximum image width
* @param max_h maximum image height
* @param format ART_FMT_PNG for png, ART_FMT_JPEG for jpeg or 0 if no artwork available
* @param filename the full path to the artwork file (could be an jpg/png image or a media file with embedded artwork) or empty if no artwork available
* @param evbuf event buffer containing the (scaled) image
* @return 0 if successful, -1 if an error occurred
*/
int
cache_artwork_add(int type, int64_t persistentid, int max_w, int max_h, int format, char *filename, struct evbuffer *evbuf)
{
struct cache_arg cmdarg;
if (!g_initialized)
return -1;
cmdarg.type = type;
cmdarg.persistentid = persistentid;
cmdarg.max_w = max_w;
cmdarg.max_h = max_h;
cmdarg.format = format;
cmdarg.path = filename;
cmdarg.evbuf = evbuf;
return commands_exec_sync(cmdbase, cache_artwork_add_impl, NULL, &cmdarg);
}
/*
* Get the cached artwork image for the given persistentid and maximum width/height
*
* If there is a cached entry for the given id and width/height, the parameter cached is set to 1.
* In this case format and data contain the cached values.
*
* @param persistentid persistent songalbumid or songartistid
* @param max_w maximum image width
* @param max_h maximum image height
* @param cached set by this function to 0 if no cache entry exists, otherwise 1
* @param format set by this function to the format of the cache entry
* @param evbuf event buffer filled by this function with the scaled image
* @return 0 if successful, -1 if an error occurred
*/
int
cache_artwork_get(int type, int64_t persistentid, int max_w, int max_h, int *cached, int *format, struct evbuffer *evbuf)
{
struct cache_arg cmdarg;
int ret;
if (!g_initialized)
{
*cached = 0;
*format = 0;
return 0;
}
cmdarg.type = type;
cmdarg.persistentid = persistentid;
cmdarg.max_w = max_w;
cmdarg.max_h = max_h;
cmdarg.evbuf = evbuf;
ret = commands_exec_sync(cmdbase, cache_artwork_get_impl, NULL, &cmdarg);
*format = cmdarg.format;
*cached = cmdarg.cached;
return ret;
}
/*
* Put an artwork image in the in-memory stash (the previous will be deleted)
*
* @param evbuf event buffer with the cached image to cache
* @param path the source (url) of the image to stash
* @param format the format of the image
* @return 0 if successful, -1 if an error occurred
*/
int
cache_artwork_stash(struct evbuffer *evbuf, const char *path, int format)
{
struct cache_arg cmdarg;
if (!g_initialized)
return -1;
cmdarg.evbuf = evbuf;
cmdarg.path = path;
cmdarg.format = format;
return commands_exec_sync(cmdbase, cache_artwork_stash_impl, NULL, &cmdarg);
}
/*
* Read the cached artwork image in the in-memory stash into evbuffer
*
* @param evbuf event buffer filled by this function with the cached image
* @param path this function will check that the path matches the cached image's path
* @param format set by this function to the format of the image
* @return 0 if successful, -1 if an error occurred
*/
int
cache_artwork_read(struct evbuffer *evbuf, const char *path, int *format)
{
struct cache_arg cmdarg;
int ret;
if (!g_initialized)
return -1;
cmdarg.evbuf = evbuf;
cmdarg.path = path;
ret = commands_exec_sync(cmdbase, cache_artwork_read_impl, NULL, &cmdarg);
*format = cmdarg.format;
return ret;
}
/* -------------------------- Cache general API --------------------------- */
int
cache_init(void)
{
int ret;
g_initialized = 0;
g_db_path = cfg_getstr(cfg_getsec(cfg, "general"), "cache_path");
if (!g_db_path || (strlen(g_db_path) == 0))
{
DPRINTF(E_LOG, L_CACHE, "Cache path invalid, disabling cache\n");
return 0;
}
g_cfg_threshold = cfg_getint(cfg_getsec(cfg, "general"), "cache_daap_threshold");
if (g_cfg_threshold == 0)
{
DPRINTF(E_LOG, L_CACHE, "Cache threshold set to 0, disabling cache\n");
return 0;
}
evbase_cache = event_base_new();
if (!evbase_cache)
{
DPRINTF(E_LOG, L_CACHE, "Could not create an event base\n");
goto evbase_fail;
}
cache_daap_updateev = evtimer_new(evbase_cache, cache_daap_update_cb, NULL);
if (!cache_daap_updateev)
{
DPRINTF(E_LOG, L_CACHE, "Could not create cache event\n");
goto evnew_fail;
}
cmdbase = commands_base_new(evbase_cache, NULL);
ret = listener_add(cache_daap_listener_cb, LISTENER_DATABASE);
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Could not create listener event\n");
goto listener_fail;
}
DPRINTF(E_INFO, L_CACHE, "cache thread init\n");
ret = pthread_create(&tid_cache, NULL, cache, NULL);
if (ret < 0)
{
DPRINTF(E_LOG, L_CACHE, "Could not spawn cache thread: %s\n", strerror(errno));
goto thread_fail;
}
thread_setname(tid_cache, "cache");
return 0;
thread_fail:
listener_remove(cache_daap_listener_cb);
listener_fail:
commands_base_free(cmdbase);
evnew_fail:
event_base_free(evbase_cache);
evbase_cache = NULL;
evbase_fail:
return -1;
}
void
cache_deinit(void)
{
int ret;
if (!g_initialized)
return;
g_initialized = 0;
listener_remove(cache_daap_listener_cb);
commands_base_destroy(cmdbase);
ret = pthread_join(tid_cache, NULL);
if (ret != 0)
{
DPRINTF(E_FATAL, L_CACHE, "Could not join cache thread: %s\n", strerror(errno));
return;
}
// Free event base
event_free(cache_daap_updateev);
event_base_free(evbase_cache);
}
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