119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/*-
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* Copyright (c) 2008-2010 Juan Romero Pardines.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <pthread.h>
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#include <xbps_api.h>
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#include "xbps_api_impl.h"
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/**
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* @file lib/regpkgdb_dictionary.c
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* @brief Package register database routines
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* @defgroup regpkgdb Package register database functions
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*
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* These functions will initialize and release (resources of)
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* the registered packages database plist file (defined by XBPS_REGPKGDB).
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*
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* The returned dictionary by xbps_regpkgs_dictionary_init() uses
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* the structure as shown in the next graph:
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*
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* @image html images/xbps_regpkgdb_dictionary.png
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*
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* Legend:
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* - <b>Salmon filled box</b>: \a XBPS_REGPKGDB_PLIST file internalized.
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* - <b>White filled box</b>: mandatory objects.
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* - <b>Grey filled box</b>: optional objects.
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* - <b>Green filled box</b>: possible value set in the object, only one
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* of them is set.
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*
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* Text inside of white boxes are the key associated with the object, its
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* data type is specified on its edge, i.e array, bool, integer, string,
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* dictionary.
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*/
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static prop_dictionary_t regpkgdb_dict;
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static size_t regpkgdb_refcnt;
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static bool regpkgdb_initialized;
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static pthread_mutex_t refcnt_mtx = PTHREAD_MUTEX_INITIALIZER;
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prop_dictionary_t
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xbps_regpkgdb_dictionary_get(void)
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{
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char *plist;
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if (regpkgdb_initialized) {
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pthread_mutex_lock(&refcnt_mtx);
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regpkgdb_refcnt++;
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pthread_mutex_unlock(&refcnt_mtx);
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return regpkgdb_dict;
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}
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plist = xbps_xasprintf("%s/%s/%s", xbps_get_rootdir(),
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XBPS_META_PATH, XBPS_REGPKGDB);
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if (plist == NULL)
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return NULL;
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regpkgdb_dict = prop_dictionary_internalize_from_zfile(plist);
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if (regpkgdb_dict == NULL) {
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free(plist);
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if (errno != ENOENT)
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xbps_dbg_printf("[regpkgdb] cannot internalize "
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"regpkgdb_dict %s\n", strerror(errno));
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return NULL;
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}
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free(plist);
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regpkgdb_initialized = true;
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xbps_dbg_printf("%s: initialized ok.\n", __func__);
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pthread_mutex_lock(&refcnt_mtx);
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regpkgdb_refcnt = 1;
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pthread_mutex_unlock(&refcnt_mtx);
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return regpkgdb_dict;
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}
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void
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xbps_regpkgdb_dictionary_release(void)
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{
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size_t cnt;
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pthread_mutex_lock(&refcnt_mtx);
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cnt = regpkgdb_refcnt--;
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pthread_mutex_unlock(&refcnt_mtx);
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if (cnt != 1)
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return;
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prop_object_release(regpkgdb_dict);
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regpkgdb_dict = NULL;
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regpkgdb_initialized = false;
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xbps_dbg_printf("%s: released ok.\n", __func__);
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}
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