Major changes in libxbps to implement caching in some cases.

libxbps:
 - Moved repolist code to lib/repository_pool.c.
 - Renamed xbps_{prepare,release}_repolist_data() to
   xbps_repository_pool_{init,release} respectively.
 - Moved regpkgdb dict code to lib/regpkgs_dictionary.c.
 - Renamed xbps_{prepare,release}_regpkgdb_dict() to
   xbps_regpkgs_dictionary_{init,release} respectively.
 - Use a global reference count for repository_pool and regpkgs_dictionary,
   this gives a substantial performance gain while looking for dependencies
   in repository pool, among other things.
 - Make xbps_find_pkg_* functions return errno and use it to detect
   for spurious errors in code using them.
 - Add code to detect when a dependency is already unpacked.

xbps-bin:
 - Do not set pkg state to unpacked in the transaction, it's set already
   while a package is unpacked.
 - While installing or updating packages, it now knows when a dependency
   is already unpacked and shows it as "unconfigured".

Bump XBPS_RELVER to 20091126.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20091126022250-uu8x0fa86l4scb5x

lib/repository_pool.c

@@ -0,0 +1,148 @@
+/*-
+ * Copyright (c) 2009 Juan Romero Pardines.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <xbps_api.h>
+
+static size_t repolist_refcnt;
+static bool repolist_initialized;
+
+int SYMEXPORT
+xbps_repository_pool_init(void)
+{
+	prop_dictionary_t dict = NULL;
+	prop_array_t array;
+	prop_object_t obj;
+	prop_object_iterator_t iter;
+	struct repository_data *rdata;
+	char *plist;
+	int rv = 0;
+
+	if (repolist_initialized) {
+		repolist_refcnt++;
+		return 0;
+	}
+
+	SIMPLEQ_INIT(&repodata_queue);
+
+	plist = xbps_xasprintf("%s/%s/%s", xbps_get_rootdir(),
+	    XBPS_META_PATH, XBPS_REPOLIST);
+	if (plist == NULL) {
+		rv = EINVAL;
+		goto out;
+	}
+
+	dict = prop_dictionary_internalize_from_file(plist);
+	if (dict == NULL) {
+                free(plist);
+		rv = errno;
+		goto out;
+	}
+	free(plist);
+
+	array = prop_dictionary_get(dict, "repository-list");
+	if (array == NULL) {
+		rv = EINVAL;
+		goto out1;
+	}
+
+	iter = prop_array_iterator(array);
+	if (iter == NULL) {
+		rv = ENOMEM;
+		goto out1;
+	}
+
+	while ((obj = prop_object_iterator_next(iter)) != NULL) {
+		/*
+		 * Iterate over the repository pool and add the dictionary
+		 * for current repository into the queue.
+		 */
+		plist =
+		    xbps_get_pkg_index_plist(prop_string_cstring_nocopy(obj));
+		if (plist == NULL) {
+			rv = EINVAL;
+			goto out2;
+		}
+
+		rdata = malloc(sizeof(struct repository_data));
+		if (rdata == NULL) {
+			rv = errno;
+			goto out2;
+		}
+
+		rdata->rd_uri = prop_string_cstring(obj);
+		if (rdata->rd_uri == NULL) {
+			free(plist);
+			rv = EINVAL;
+			goto out2;
+		}
+		rdata->rd_repod = prop_dictionary_internalize_from_file(plist);
+		if (rdata->rd_repod == NULL) {
+			free(plist);
+			rv = errno;
+			goto out2;
+		}
+		free(plist);
+		SIMPLEQ_INSERT_TAIL(&repodata_queue, rdata, chain);
+	}
+
+	repolist_initialized = true;
+	repolist_refcnt = 1;
+	DPRINTF(("%s: initialized ok.\n", __func__));
+out2:
+	prop_object_iterator_release(iter);
+out1:
+	prop_object_release(dict);
+out:
+	if (rv != 0)
+		xbps_repository_pool_release();
+
+	return rv;
+
+}
+
+void SYMEXPORT
+xbps_repository_pool_release(void)
+{
+	struct repository_data *rdata;
+
+	if (--repolist_refcnt > 0)
+		return;
+
+	while ((rdata = SIMPLEQ_FIRST(&repodata_queue)) != NULL) {
+		SIMPLEQ_REMOVE(&repodata_queue, rdata, repository_data, chain);
+		prop_object_release(rdata->rd_repod);
+		free(rdata->rd_uri);
+		free(rdata);
+	}
+	repolist_refcnt = 0;
+	repolist_initialized = false;
+	DPRINTF(("%s: released ok.\n", __func__));
+}