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85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/* Plugin based services architecture for finit
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*
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* Copyright (c) 2012 Joachim Nilsson <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef PLUGIN_H_
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#define PLUGIN_H_
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#include <sys/queue.h> /* BSD sys/queue.h API */
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#define PLUGIN_INIT(x) void x(void) __attribute__ ((constructor));
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#define PLUGIN_EXIT(x) void x(void) __attribute__ ((destructor));
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#define PLUGIN_ITERATOR(x) LIST_FOREACH(x, &plugins, link)
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/*
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* Predefined hook points for easier plugin debugging
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*/
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typedef enum {
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HOOK_POST_LOAD = 0,
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HOOK_PRE_SETUP,
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HOOK_POST_SIGSETUP,
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HOOK_POST_NETWORK,
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HOOK_PRE_RUNLOOP,
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HOOK_SHUTDOWN,
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HOOK_MAX_NUM
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} hook_point_t;
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typedef struct plugin {
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/* BSD sys/queue.h linked list node. */
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LIST_ENTRY(plugin) link;
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/* Optional plugin name, defaults to plugin path if unset. */
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const char *name;
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/* Service callback to be called once per lap of runloop. */
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struct {
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void *arg; /* Optional argument to callback func. */
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void (*cb) (void *);
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} svc;
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/* List of hook callbacks. */
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struct {
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void *arg; /* Optional argument to callback func. */
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void (*cb) (void *);
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} hook[HOOK_MAX_NUM];
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} plugin_t;
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/* Public plugin API */
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int plugin_register (plugin_t *plugin);
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int plugin_unregister (plugin_t *plugin);
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/* Private daemon API */
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void run_hooks (hook_point_t no);
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void run_services (void);
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int load_plugins (char *path);
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#endif /* PLUGIN_H_ */
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/**
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* Local Variables:
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* version-control: t
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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