Re-enable threaded host resolving

[pazpar2-moved-to-github.git] / src / host.c

diff --git a/src/host.c b/src/host.c
new file mode 100644 (file)
index 0000000..57c6eb6
--- /dev/null
+++ b/src/host.c
@@ -0,0 +1,153 @@
+/* This file is part of Pazpar2.
+   Copyright (C) 2006-2011 Index Data
+
+Pazpar2 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, or (at your option) any later
+version.
+
+Pazpar2 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 St, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <yaz/log.h>
+#include <yaz/nmem.h>
+
+#include "ppmutex.h"
+#include "session.h"
+#include "host.h"
+
+#include <sys/types.h>
+
+struct database_hosts {
+    struct host *hosts;
+    YAZ_MUTEX mutex;
+};
+
+// Create a new host structure for hostport
+static struct host *create_host(const char *url, const char *proxy,
+                                int default_port,
+                                iochan_man_t iochan_man)
+{
+    struct host *host;
+    char *db_comment;
+
+    host = xmalloc(sizeof(struct host));
+    host->url = xstrdup(url);
+    host->proxy = 0;
+    host->tproxy = 0;
+    if (proxy && *proxy)
+        host->proxy = xstrdup(proxy);
+    else
+    {
+        char *cp;
+        
+        host->tproxy = xmalloc (strlen(url) + 10); /* so we can add :port */
+        strcpy(host->tproxy, url);
+        for (cp = host->tproxy; *cp; cp++)
+            if (strchr("/?#~", *cp))
+            {
+                *cp = '\0';
+                break;
+            }
+        if (!strchr(host->tproxy, ':'))
+            sprintf(cp, ":%d", default_port); /* no port given, add it */
+    }
+
+    db_comment = strchr(host->url, '#');
+    if (db_comment)
+        *db_comment = '\0';
+    host->connections = 0;
+    host->ipport = 0;
+    host->mutex = 0;
+
+    if (host_getaddrinfo(host, iochan_man))
+    {
+        xfree(host->ipport);
+        xfree(host->tproxy);
+        xfree(host->proxy);
+        xfree(host->url);
+        xfree(host);
+        return 0;
+    }
+    pazpar2_mutex_create(&host->mutex, "host");
+
+    yaz_cond_create(&host->cond_ready);
+
+    return host;
+}
+
+struct host *find_host(database_hosts_t hosts, const char *url,
+                       const char *proxy, int port,
+                       iochan_man_t iochan_man)
+{
+    struct host *p;
+    yaz_mutex_enter(hosts->mutex);
+    for (p = hosts->hosts; p; p = p->next)
+        if (!strcmp(p->url, url))
+            break;
+    if (!p)
+    {
+        p = create_host(url, proxy, port, iochan_man);
+        if (p)
+        {
+            p->next = hosts->hosts;
+            hosts->hosts = p;
+        }
+    }
+    yaz_mutex_leave(hosts->mutex);
+    return p;
+}
+
+database_hosts_t database_hosts_create(void)
+{
+    database_hosts_t p = xmalloc(sizeof(*p));
+    p->hosts = 0;
+    p->mutex = 0;
+    pazpar2_mutex_create(&p->mutex, "database");
+    return p;
+}
+
+void database_hosts_destroy(database_hosts_t *pp)
+{
+    if (*pp)
+    {
+        struct host *p = (*pp)->hosts;
+        while (p)
+        {
+            struct host *p_next = p->next;
+            yaz_mutex_destroy(&p->mutex);
+            yaz_cond_destroy(&p->cond_ready);
+            xfree(p->url);
+            xfree(p->ipport);
+            xfree(p);
+            p = p_next;
+        }
+        yaz_mutex_destroy(&(*pp)->mutex);
+        xfree(*pp);
+    }
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+