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Diffstat (limited to 'libglusterfs/src/gf-event.h')
| -rw-r--r-- | libglusterfs/src/gf-event.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libglusterfs/src/gf-event.h b/libglusterfs/src/gf-event.h new file mode 100644 index 00000000000..55a74ed17c6 --- /dev/null +++ b/libglusterfs/src/gf-event.h @@ -0,0 +1,119 @@ +/* + Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#ifndef _GF_EVENT_H_ +#define _GF_EVENT_H_ + +#include <pthread.h> + +struct event_pool; +struct event_ops; +struct event_slot_poll; +struct event_slot_epoll; +struct event_data { + int idx; + int gen; +} __attribute__ ((__packed__, __may_alias__)); + + +typedef int (*event_handler_t) (int fd, int idx, int gen, void *data, + int poll_in, int poll_out, int poll_err); + +#define EVENT_EPOLL_TABLES 1024 +#define EVENT_EPOLL_SLOTS 1024 +#define EVENT_MAX_THREADS 1024 + +struct event_pool { + struct event_ops *ops; + + int fd; + int breaker[2]; + + int count; + struct event_slot_poll *reg; + struct event_slot_epoll *ereg[EVENT_EPOLL_TABLES]; + int slots_used[EVENT_EPOLL_TABLES]; + + int used; + int changed; + + pthread_mutex_t mutex; + pthread_cond_t cond; + + void *evcache; + int evcache_size; + + /* NOTE: Currently used only when event processing is done using + * epoll. */ + int eventthreadcount; /* number of event threads to execute. */ + pthread_t pollers[EVENT_MAX_THREADS]; /* poller thread_id store, + * and live status */ + int destroy; + int activethreadcount; + + /* + * Number of threads created by auto-scaling, *in addition to* the + * configured number of threads. This is only applicable on the + * server, where we try to keep the number of threads around the number + * of bricks. In that case, the configured number is just "extra" + * threads to handle requests in excess of one per brick (including + * requests on the GlusterD connection). For clients or GlusterD, this + * number will always be zero, so the "extra" is all we have. + * + * TBD: consider auto-scaling for clients as well + */ + int auto_thread_count; + +}; + +struct event_destroy_data { + int readfd; + struct event_pool *pool; +}; + +struct event_ops { + struct event_pool * (*new) (int count, int eventthreadcount); + + int (*event_register) (struct event_pool *event_pool, int fd, + event_handler_t handler, + void *data, int poll_in, int poll_out); + + int (*event_select_on) (struct event_pool *event_pool, int fd, int idx, + int poll_in, int poll_out); + + int (*event_unregister) (struct event_pool *event_pool, int fd, int idx); + + int (*event_unregister_close) (struct event_pool *event_pool, int fd, + int idx); + + int (*event_dispatch) (struct event_pool *event_pool); + + int (*event_reconfigure_threads) (struct event_pool *event_pool, + int newcount); + int (*event_pool_destroy) (struct event_pool *event_pool); + int (*event_handled) (struct event_pool *event_pool, int fd, int idx, + int gen); +}; + +struct event_pool *event_pool_new (int count, int eventthreadcount); +int event_select_on (struct event_pool *event_pool, int fd, int idx, + int poll_in, int poll_out); +int event_register (struct event_pool *event_pool, int fd, + event_handler_t handler, + void *data, int poll_in, int poll_out); +int event_unregister (struct event_pool *event_pool, int fd, int idx); +int event_unregister_close (struct event_pool *event_pool, int fd, int idx); +int event_dispatch (struct event_pool *event_pool); +int event_reconfigure_threads (struct event_pool *event_pool, int value); +int event_pool_destroy (struct event_pool *event_pool); +int event_dispatch_destroy (struct event_pool *event_pool); +int event_handled (struct event_pool *event_pool, int fd, int idx, int gen); + +#endif /* _GF_EVENT_H_ */ |