mirror of /home/gitosis/repositories/libev.git
Marc Alexander Lehmann
15 years ago
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c3e49f1130
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6 changed files with 261 additions and 26 deletions
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/*
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* Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#include <sys/time.h> |
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#include <stdint.h> |
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#include <stdarg.h> |
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#ifdef WIN32 |
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#define WIN32_LEAN_AND_MEAN |
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#include <windows.h> |
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#undef WIN32_LEAN_AND_MEAN |
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typedef unsigned char u_char; |
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typedef unsigned short u_short; |
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#endif |
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/* Fix so that ppl dont have to run with <sys/queue.h> */ |
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#ifndef TAILQ_ENTRY |
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#define _EVENT_DEFINED_TQENTRY |
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#define TAILQ_ENTRY(type) \ |
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struct { \
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struct type *tqe_next; /* next element */ \
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struct type **tqe_prev; /* address of previous next element */ \
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} |
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#endif /* !TAILQ_ENTRY */ |
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#ifndef RB_ENTRY |
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#define _EVENT_DEFINED_RBENTRY |
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#define RB_ENTRY(type) \ |
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struct { \
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struct type *rbe_left; /* left element */ \
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struct type *rbe_right; /* right element */ \
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struct type *rbe_parent; /* parent element */ \
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int rbe_color; /* node color */ \
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} |
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#endif /* !RB_ENTRY */ |
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/*
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* Key-Value pairs. Can be used for HTTP headers but also for |
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* query argument parsing. |
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*/ |
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struct evkeyval { |
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TAILQ_ENTRY(evkeyval) next; |
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char *key; |
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char *value; |
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}; |
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#ifdef _EVENT_DEFINED_TQENTRY |
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#undef TAILQ_ENTRY |
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struct event_list; |
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struct evkeyvalq; |
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#undef _EVENT_DEFINED_TQENTRY |
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#else |
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TAILQ_HEAD (event_list, event); |
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TAILQ_HEAD (evkeyvalq, evkeyval); |
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#endif /* _EVENT_DEFINED_TQENTRY */ |
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#ifdef _EVENT_DEFINED_RBENTRY |
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#undef RB_ENTRY |
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#undef _EVENT_DEFINED_RBENTRY |
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#endif /* _EVENT_DEFINED_RBENTRY */ |
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struct eventop { |
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char *name; |
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void *(*init)(struct event_base *); |
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int (*add)(void *, struct event *); |
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int (*del)(void *, struct event *); |
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int (*recalc)(struct event_base *, void *, int); |
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int (*dispatch)(struct event_base *, void *, struct timeval *); |
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void (*dealloc)(struct event_base *, void *); |
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}; |
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/* These functions deal with buffering input and output */ |
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struct evbuffer { |
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u_char *buffer; |
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u_char *orig_buffer; |
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size_t misalign; |
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size_t totallen; |
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size_t off; |
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void (*cb)(struct evbuffer *, size_t, size_t, void *); |
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void *cbarg; |
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}; |
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/* Just for error reporting - use other constants otherwise */ |
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#define EVBUFFER_READ 0x01 |
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#define EVBUFFER_WRITE 0x02 |
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#define EVBUFFER_EOF 0x10 |
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#define EVBUFFER_ERROR 0x20 |
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#define EVBUFFER_TIMEOUT 0x40 |
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struct bufferevent; |
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typedef void (*evbuffercb)(struct bufferevent *, void *); |
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typedef void (*everrorcb)(struct bufferevent *, short what, void *); |
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struct event_watermark { |
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size_t low; |
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size_t high; |
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}; |
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struct bufferevent { |
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struct event ev_read; |
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struct event ev_write; |
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struct evbuffer *input; |
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struct evbuffer *output; |
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struct event_watermark wm_read; |
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struct event_watermark wm_write; |
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evbuffercb readcb; |
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evbuffercb writecb; |
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everrorcb errorcb; |
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void *cbarg; |
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int timeout_read; /* in seconds */ |
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int timeout_write; /* in seconds */ |
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short enabled; /* events that are currently enabled */ |
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}; |
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struct bufferevent *bufferevent_new(int fd, |
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evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg); |
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int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev); |
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int bufferevent_priority_set(struct bufferevent *bufev, int pri); |
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void bufferevent_free(struct bufferevent *bufev); |
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int bufferevent_write(struct bufferevent *bufev, void *data, size_t size); |
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int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf); |
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size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size); |
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int bufferevent_enable(struct bufferevent *bufev, short event); |
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int bufferevent_disable(struct bufferevent *bufev, short event); |
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void bufferevent_settimeout(struct bufferevent *bufev, |
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int timeout_read, int timeout_write); |
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#define EVBUFFER_LENGTH(x) (x)->off |
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#define EVBUFFER_DATA(x) (x)->buffer |
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#define EVBUFFER_INPUT(x) (x)->input |
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#define EVBUFFER_OUTPUT(x) (x)->output |
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struct evbuffer *evbuffer_new(void); |
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void evbuffer_free(struct evbuffer *); |
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int evbuffer_expand(struct evbuffer *, size_t); |
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int evbuffer_add(struct evbuffer *, const void *, size_t); |
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int evbuffer_remove(struct evbuffer *, void *, size_t); |
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char *evbuffer_readline(struct evbuffer *); |
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int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *); |
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int evbuffer_add_printf(struct evbuffer *, const char *fmt, ...); |
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int evbuffer_add_vprintf(struct evbuffer *, const char *fmt, va_list ap); |
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void evbuffer_drain(struct evbuffer *, size_t); |
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int evbuffer_write(struct evbuffer *, int); |
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int evbuffer_read(struct evbuffer *, int, int); |
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u_char *evbuffer_find(struct evbuffer *, const u_char *, size_t); |
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void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *); |
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/*
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* Marshaling tagged data - We assume that all tags are inserted in their |
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* numeric order - so that unknown tags will always be higher than the |
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* known ones - and we can just ignore the end of an event buffer. |
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*/ |
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void evtag_init(void); |
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void evtag_marshal(struct evbuffer *evbuf, uint8_t tag, const void *data, |
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uint32_t len); |
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void encode_int(struct evbuffer *evbuf, uint32_t number); |
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void evtag_marshal_int(struct evbuffer *evbuf, uint8_t tag, uint32_t integer); |
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void evtag_marshal_string(struct evbuffer *buf, uint8_t tag, |
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const char *string); |
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void evtag_marshal_timeval(struct evbuffer *evbuf, uint8_t tag, |
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struct timeval *tv); |
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void evtag_test(void); |
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int evtag_unmarshal(struct evbuffer *src, uint8_t *ptag, struct evbuffer *dst); |
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int evtag_peek(struct evbuffer *evbuf, uint8_t *ptag); |
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int evtag_peek_length(struct evbuffer *evbuf, uint32_t *plength); |
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int evtag_payload_length(struct evbuffer *evbuf, uint32_t *plength); |
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int evtag_consume(struct evbuffer *evbuf); |
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int evtag_unmarshal_int(struct evbuffer *evbuf, uint8_t need_tag, |
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uint32_t *pinteger); |
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int evtag_unmarshal_fixed(struct evbuffer *src, uint8_t need_tag, void *data, |
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size_t len); |
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int evtag_unmarshal_string(struct evbuffer *evbuf, uint8_t need_tag, |
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char **pstring); |
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int evtag_unmarshal_timeval(struct evbuffer *evbuf, uint8_t need_tag, |
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struct timeval *ptv); |
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#ifdef __cplusplus |
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} |
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#endif |
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