Ichthyostega
806db414dd
* Lumiera source code always was copyrighted by individual contributors * there is no entity "Lumiera.org" which holds any copyrights * Lumiera source code is provided under the GPL Version 2+ == Explanations == Lumiera as a whole is distributed under Copyleft, GNU General Public License Version 2 or above. For this to become legally effective, the ''File COPYING in the root directory is sufficient.'' The licensing header in each file is not strictly necessary, yet considered good practice; attaching a licence notice increases the likeliness that this information is retained in case someone extracts individual code files. However, it is not by the presence of some text, that legally binding licensing terms become effective; rather the fact matters that a given piece of code was provably copyrighted and published under a license. Even reformatting the code, renaming some variables or deleting parts of the code will not alter this legal situation, but rather creates a derivative work, which is likewise covered by the GPL! The most relevant information in the file header is the notice regarding the time of the first individual copyright claim. By virtue of this initial copyright, the first author is entitled to choose the terms of licensing. All further modifications are permitted and covered by the License. The specific wording or format of the copyright header is not legally relevant, as long as the intention to publish under the GPL remains clear. The extended wording was based on a recommendation by the FSF. It can be shortened, because the full terms of the license are provided alongside the distribution, in the file COPYING.
267 lines
7.2 KiB
C
267 lines
7.2 KiB
C
/*
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InterfaceRegistry - registry for extension points
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Copyright (C)
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2008, Christian Thaeter <ct@pipapo.org>
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**Lumiera** is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version. See the file COPYING for further details.
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* *****************************************************************/
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/** @file interfaceregistry.c
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** Interface instances are published and activated by registering them
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** into a global registry, which is defined here. This instances are identified
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** by their name and major version.
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*/
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#include "include/logging.h"
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#include "lib/error.h"
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#include "lib/psplay.h"
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#include "lib/safeclib.h"
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#include <nobug.h>
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#include "common/plugin.h"
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#include "common/interfaceregistry.h"
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PSplay lumiera_interfaceregistry;
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PSplay lumiera_pluginregistry;
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lumiera_recmutex lumiera_interface_mutex;
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static int
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lumiera_interface_cmp_fn (const void* keya, const void* keyb);
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static const void*
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lumiera_interface_key_fn (const PSplaynode node);
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static LumieraInterfacenode
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lumiera_interfacenode_new (LumieraInterface iface, LumieraPlugin plugin)
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{
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LumieraInterfacenode self = lumiera_malloc (sizeof (*self));
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psplaynode_init (&self->node);
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self->interface = iface;
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self->refcnt = 0;
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self->plugin = plugin;
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self->lnk = NULL;
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self->deps_size = 0;
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self->deps = NULL;
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return self;
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}
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static void
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lumiera_interfacenode_delete (LumieraInterfacenode self)
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{
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if (self)
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{
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REQUIRE (self->refcnt == 0);
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lumiera_free (self->deps);
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lumiera_free (self);
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}
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}
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/** Initialise the interface registry */
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void
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lumiera_interfaceregistry_init (void)
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{
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TRACE (interfaceregistry_dbg);
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REQUIRE (!lumiera_interfaceregistry);
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REQUIRE (!lumiera_pluginregistry);
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lumiera_interfaceregistry = psplay_new (lumiera_interface_cmp_fn, lumiera_interface_key_fn, NULL);
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if (!lumiera_interfaceregistry)
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LUMIERA_DIE (ERRNO);
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lumiera_pluginregistry = psplay_new (lumiera_plugin_cmp_fn, lumiera_plugin_key_fn, lumiera_plugin_delete_fn);
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if (!lumiera_pluginregistry)
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LUMIERA_DIE (ERRNO);
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lumiera_recmutex_init (&lumiera_interface_mutex, "interfaceregistry", &NOBUG_FLAG(interfaceregistry), NOBUG_CONTEXT);
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lumiera_interface_init ();
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}
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void
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lumiera_interfaceregistry_destroy (void)
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{
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TRACE (interfaceregistry_dbg);
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lumiera_interface_destroy ();
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if (lumiera_pluginregistry)
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psplay_delete (lumiera_pluginregistry);
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lumiera_pluginregistry = NULL;
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lumiera_recmutex_destroy (&lumiera_interface_mutex, &NOBUG_FLAG(mutex_dbg), NOBUG_CONTEXT);
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REQUIRE (!psplay_nelements (lumiera_interfaceregistry), "some interfaces still registered at shutdown");
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if (lumiera_interfaceregistry)
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psplay_destroy (lumiera_interfaceregistry);
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lumiera_interfaceregistry = NULL;
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}
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void
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lumiera_interfaceregistry_register_interface (LumieraInterface self, LumieraPlugin plugin)
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{
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TRACE (interfaceregistry_dbg);
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REQUIRE (self);
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LUMIERA_RECMUTEX_SECTION (mutex_sync, &lumiera_interface_mutex)
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{
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TRACE (interfaceregistry, "interface %s, version %d, instance %s", self->interface, self->version, self->name);
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psplay_insert (lumiera_interfaceregistry, &lumiera_interfacenode_new (self, plugin)->node, 100);
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}
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}
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void
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lumiera_interfaceregistry_bulkregister_interfaces (LumieraInterface* self, LumieraPlugin plugin)
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{
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TRACE (interfaceregistry_dbg);
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REQUIRE (self);
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LUMIERA_RECMUTEX_SECTION (mutex_sync, &lumiera_interface_mutex)
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{
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while (*self)
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{
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TRACE (interfaceregistry, "interface %s, version %d, instance %s", (*self)->interface, (*self)->version, (*self)->name);
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psplay_insert (lumiera_interfaceregistry, &lumiera_interfacenode_new (*self, plugin)->node, 100);
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++self;
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}
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}
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}
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void
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lumiera_interfaceregistry_remove_interface (LumieraInterface self)
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{
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TRACE (interfaceregistry_dbg);
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REQUIRE (self);
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LUMIERA_RECMUTEX_SECTION (mutex_sync, &lumiera_interface_mutex)
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{
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TRACE (interfaceregistry, "interface %s, version %d, instance %s", self->interface, self->version, self->name);
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LumieraInterfacenode node = (LumieraInterfacenode) psplay_find (lumiera_interfaceregistry, self, 0);
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REQUIRE (node->refcnt == 0, "but is %d", node->refcnt);
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lumiera_interfacenode_delete ((LumieraInterfacenode)psplay_remove (lumiera_interfaceregistry, &node->node));
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}
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}
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void
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lumiera_interfaceregistry_bulkremove_interfaces (LumieraInterface* self)
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{
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TRACE (interfaceregistry_dbg);
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REQUIRE (self);
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LUMIERA_RECMUTEX_SECTION (mutex_sync, &lumiera_interface_mutex)
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{
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while (*self)
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{
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TRACE (interfaceregistry, "interface %s, version %d, instance %s", (*self)->interface, (*self)->version, (*self)->name);
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LumieraInterfacenode node = (LumieraInterfacenode) psplay_find (lumiera_interfaceregistry, *self, 0);
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if (node)
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{
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REQUIRE (node->refcnt == 0, "but is %d", node->refcnt);
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lumiera_interfacenode_delete ((LumieraInterfacenode) psplay_remove (lumiera_interfaceregistry, &node->node));
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}
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else
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{
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///////////TICKET #864 : should not happen but does happen in practice, e.g. when there is a copy or another library linked against that module
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/////////// Guess the pluginloader should not have added the duplicate into the interfaceregistry on discovery.
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WARN (interfaceregistry, "ENTRY NOT FOUND in interfaceregistry at clean-up of interface %s, instance %s"
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, (*self)->interface
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, (*self)->name);
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}
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++self;
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}
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}
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}
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LumieraInterfacenode
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lumiera_interfaceregistry_interfacenode_find (const char* interface, unsigned version, const char* name)
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{
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TRACE (interfaceregistry_dbg);
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struct lumiera_interface_struct cmp;
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cmp.interface = interface;
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cmp.version = version;
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cmp.name = name;
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LumieraInterfacenode ret = NULL;
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LUMIERA_RECMUTEX_SECTION (mutex_sync, &lumiera_interface_mutex)
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{
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ret = (LumieraInterfacenode)psplay_find (lumiera_interfaceregistry, &cmp, 100);
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}
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return ret;
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}
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LumieraInterface
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lumiera_interfaceregistry_interface_find (const char* interface, unsigned version, const char* name)
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{
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return lumiera_interfaceregistry_interfacenode_find (interface, version, name)->interface;
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}
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static int
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lumiera_interface_cmp_fn (const void* keya, const void* keyb)
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{
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const LumieraInterface a = (const LumieraInterface)keya;
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const LumieraInterface b = (const LumieraInterface)keyb;
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int r = strcmp (a->interface, b->interface);
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if (r<0)
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return -1;
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else if (r>0)
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return 1;
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if (a->version < b->version)
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return -1;
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else if (a->version > b->version)
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return 1;
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r = strcmp (a->name, b->name);
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if (r<0)
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return -1;
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else if (r>0)
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return 1;
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return 0;
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}
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static const void*
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lumiera_interface_key_fn (const PSplaynode node)
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{
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return ((LumieraInterfacenode)node)->interface;
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}
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/*
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// Local Variables:
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// mode: C
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// c-file-style: "gnu"
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// indent-tabs-mode: nil
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// End:
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*/
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