1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/chromium/src/third_party/libevent/util-internal.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,327 @@
1.4 +/*
1.5 + * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
1.6 + *
1.7 + * Redistribution and use in source and binary forms, with or without
1.8 + * modification, are permitted provided that the following conditions
1.9 + * are met:
1.10 + * 1. Redistributions of source code must retain the above copyright
1.11 + * notice, this list of conditions and the following disclaimer.
1.12 + * 2. Redistributions in binary form must reproduce the above copyright
1.13 + * notice, this list of conditions and the following disclaimer in the
1.14 + * documentation and/or other materials provided with the distribution.
1.15 + * 3. The name of the author may not be used to endorse or promote products
1.16 + * derived from this software without specific prior written permission.
1.17 + *
1.18 + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
1.19 + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
1.20 + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
1.21 + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
1.22 + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
1.23 + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1.24 + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
1.25 + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.26 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
1.27 + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.28 + */
1.29 +#ifndef _EVENT_UTIL_INTERNAL_H
1.30 +#define _EVENT_UTIL_INTERNAL_H
1.31 +
1.32 +#include "event2/event-config.h"
1.33 +#include <errno.h>
1.34 +
1.35 +/* For EVUTIL_ASSERT */
1.36 +#include "log-internal.h"
1.37 +#include <stdio.h>
1.38 +#include <stdlib.h>
1.39 +#ifdef _EVENT_HAVE_SYS_SOCKET_H
1.40 +#include <sys/socket.h>
1.41 +#endif
1.42 +#include "event2/util.h"
1.43 +
1.44 +#include "ipv6-internal.h"
1.45 +
1.46 +#ifdef __cplusplus
1.47 +extern "C" {
1.48 +#endif
1.49 +
1.50 +/* If we need magic to say "inline", get it for free internally. */
1.51 +#ifdef _EVENT_inline
1.52 +#define inline _EVENT_inline
1.53 +#endif
1.54 +#ifdef _EVENT___func__
1.55 +#define __func__ _EVENT___func__
1.56 +#endif
1.57 +
1.58 +/* A good no-op to use in macro definitions. */
1.59 +#define _EVUTIL_NIL_STMT ((void)0)
1.60 +/* A no-op that tricks the compiler into thinking a condition is used while
1.61 + * definitely not making any code for it. Used to compile out asserts while
1.62 + * avoiding "unused variable" warnings. The "!" forces the compiler to
1.63 + * do the sizeof() on an int, in case "condition" is a bitfield value.
1.64 + */
1.65 +#define _EVUTIL_NIL_CONDITION(condition) do { \
1.66 + (void)sizeof(!(condition)); \
1.67 +} while(0)
1.68 +
1.69 +/* Internal use only: macros to match patterns of error codes in a
1.70 + cross-platform way. We need these macros because of two historical
1.71 + reasons: first, nonblocking IO functions are generally written to give an
1.72 + error on the "blocked now, try later" case, so sometimes an error from a
1.73 + read, write, connect, or accept means "no error; just wait for more
1.74 + data," and we need to look at the error code. Second, Windows defines
1.75 + a different set of error codes for sockets. */
1.76 +
1.77 +#ifndef WIN32
1.78 +
1.79 +/* True iff e is an error that means a read/write operation can be retried. */
1.80 +#define EVUTIL_ERR_RW_RETRIABLE(e) \
1.81 + ((e) == EINTR || (e) == EAGAIN)
1.82 +/* True iff e is an error that means an connect can be retried. */
1.83 +#define EVUTIL_ERR_CONNECT_RETRIABLE(e) \
1.84 + ((e) == EINTR || (e) == EINPROGRESS)
1.85 +/* True iff e is an error that means a accept can be retried. */
1.86 +#define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \
1.87 + ((e) == EINTR || (e) == EAGAIN || (e) == ECONNABORTED)
1.88 +
1.89 +/* True iff e is an error that means the connection was refused */
1.90 +#define EVUTIL_ERR_CONNECT_REFUSED(e) \
1.91 + ((e) == ECONNREFUSED)
1.92 +
1.93 +#else
1.94 +
1.95 +#define EVUTIL_ERR_RW_RETRIABLE(e) \
1.96 + ((e) == WSAEWOULDBLOCK || \
1.97 + (e) == WSAEINTR)
1.98 +
1.99 +#define EVUTIL_ERR_CONNECT_RETRIABLE(e) \
1.100 + ((e) == WSAEWOULDBLOCK || \
1.101 + (e) == WSAEINTR || \
1.102 + (e) == WSAEINPROGRESS || \
1.103 + (e) == WSAEINVAL)
1.104 +
1.105 +#define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \
1.106 + EVUTIL_ERR_RW_RETRIABLE(e)
1.107 +
1.108 +#define EVUTIL_ERR_CONNECT_REFUSED(e) \
1.109 + ((e) == WSAECONNREFUSED)
1.110 +
1.111 +#endif
1.112 +
1.113 +#ifdef _EVENT_socklen_t
1.114 +#define socklen_t _EVENT_socklen_t
1.115 +#endif
1.116 +
1.117 +/* Arguments for shutdown() */
1.118 +#ifdef SHUT_RD
1.119 +#define EVUTIL_SHUT_RD SHUT_RD
1.120 +#else
1.121 +#define EVUTIL_SHUT_RD 0
1.122 +#endif
1.123 +#ifdef SHUT_WR
1.124 +#define EVUTIL_SHUT_WR SHUT_WR
1.125 +#else
1.126 +#define EVUTIL_SHUT_WR 1
1.127 +#endif
1.128 +#ifdef SHUT_BOTH
1.129 +#define EVUTIL_SHUT_BOTH SHUT_BOTH
1.130 +#else
1.131 +#define EVUTIL_SHUT_BOTH 2
1.132 +#endif
1.133 +
1.134 +/* Locale-independent replacements for some ctypes functions. Use these
1.135 + * when you care about ASCII's notion of character types, because you are about
1.136 + * to send those types onto the wire.
1.137 + */
1.138 +int EVUTIL_ISALPHA(char c);
1.139 +int EVUTIL_ISALNUM(char c);
1.140 +int EVUTIL_ISSPACE(char c);
1.141 +int EVUTIL_ISDIGIT(char c);
1.142 +int EVUTIL_ISXDIGIT(char c);
1.143 +int EVUTIL_ISPRINT(char c);
1.144 +int EVUTIL_ISLOWER(char c);
1.145 +int EVUTIL_ISUPPER(char c);
1.146 +char EVUTIL_TOUPPER(char c);
1.147 +char EVUTIL_TOLOWER(char c);
1.148 +
1.149 +/** Helper macro. If we know that a given pointer points to a field in a
1.150 + structure, return a pointer to the structure itself. Used to implement
1.151 + our half-baked C OO. Example:
1.152 +
1.153 + struct subtype {
1.154 + int x;
1.155 + struct supertype common;
1.156 + int y;
1.157 + };
1.158 + ...
1.159 + void fn(struct supertype *super) {
1.160 + struct subtype *sub = EVUTIL_UPCAST(super, struct subtype, common);
1.161 + ...
1.162 + }
1.163 + */
1.164 +#define EVUTIL_UPCAST(ptr, type, field) \
1.165 + ((type *)(((char*)(ptr)) - evutil_offsetof(type, field)))
1.166 +
1.167 +/* As open(pathname, flags, mode), except that the file is always opened with
1.168 + * the close-on-exec flag set. (And the mode argument is mandatory.)
1.169 + */
1.170 +int evutil_open_closeonexec(const char *pathname, int flags, unsigned mode);
1.171 +
1.172 +int evutil_read_file(const char *filename, char **content_out, size_t *len_out,
1.173 + int is_binary);
1.174 +
1.175 +int evutil_socket_connect(evutil_socket_t *fd_ptr, struct sockaddr *sa, int socklen);
1.176 +
1.177 +int evutil_socket_finished_connecting(evutil_socket_t fd);
1.178 +
1.179 +int evutil_ersatz_socketpair(int, int , int, evutil_socket_t[]);
1.180 +
1.181 +int evutil_resolve(int family, const char *hostname, struct sockaddr *sa,
1.182 + ev_socklen_t *socklen, int port);
1.183 +
1.184 +const char *evutil_getenv(const char *name);
1.185 +
1.186 +long _evutil_weakrand(void);
1.187 +
1.188 +/* Evaluates to the same boolean value as 'p', and hints to the compiler that
1.189 + * we expect this value to be false. */
1.190 +#if defined(__GNUC__) && __GNUC__ >= 3 /* gcc 3.0 or later */
1.191 +#define EVUTIL_UNLIKELY(p) __builtin_expect(!!(p),0)
1.192 +#else
1.193 +#define EVUTIL_UNLIKELY(p) (p)
1.194 +#endif
1.195 +
1.196 +/* Replacement for assert() that calls event_errx on failure. */
1.197 +#ifdef NDEBUG
1.198 +#define EVUTIL_ASSERT(cond) _EVUTIL_NIL_CONDITION(cond)
1.199 +#define EVUTIL_FAILURE_CHECK(cond) 0
1.200 +#else
1.201 +#define EVUTIL_ASSERT(cond) \
1.202 + do { \
1.203 + if (EVUTIL_UNLIKELY(!(cond))) { \
1.204 + event_errx(_EVENT_ERR_ABORT, \
1.205 + "%s:%d: Assertion %s failed in %s", \
1.206 + __FILE__,__LINE__,#cond,__func__); \
1.207 + /* In case a user-supplied handler tries to */ \
1.208 + /* return control to us, log and abort here. */ \
1.209 + (void)fprintf(stderr, \
1.210 + "%s:%d: Assertion %s failed in %s", \
1.211 + __FILE__,__LINE__,#cond,__func__); \
1.212 + abort(); \
1.213 + } \
1.214 + } while (0)
1.215 +#define EVUTIL_FAILURE_CHECK(cond) EVUTIL_UNLIKELY(cond)
1.216 +#endif
1.217 +
1.218 +#ifndef _EVENT_HAVE_STRUCT_SOCKADDR_STORAGE
1.219 +/* Replacement for sockaddr storage that we can use internally on platforms
1.220 + * that lack it. It is not space-efficient, but neither is sockaddr_storage.
1.221 + */
1.222 +struct sockaddr_storage {
1.223 + union {
1.224 + struct sockaddr ss_sa;
1.225 + struct sockaddr_in ss_sin;
1.226 + struct sockaddr_in6 ss_sin6;
1.227 + char ss_padding[128];
1.228 + } ss_union;
1.229 +};
1.230 +#define ss_family ss_union.ss_sa.sa_family
1.231 +#endif
1.232 +
1.233 +/* Internal addrinfo error code. This one is returned from only from
1.234 + * evutil_getaddrinfo_common, when we are sure that we'll have to hit a DNS
1.235 + * server. */
1.236 +#define EVUTIL_EAI_NEED_RESOLVE -90002
1.237 +
1.238 +struct evdns_base;
1.239 +struct evdns_getaddrinfo_request;
1.240 +typedef struct evdns_getaddrinfo_request* (*evdns_getaddrinfo_fn)(
1.241 + struct evdns_base *base,
1.242 + const char *nodename, const char *servname,
1.243 + const struct evutil_addrinfo *hints_in,
1.244 + void (*cb)(int, struct evutil_addrinfo *, void *), void *arg);
1.245 +
1.246 +void evutil_set_evdns_getaddrinfo_fn(evdns_getaddrinfo_fn fn);
1.247 +
1.248 +struct evutil_addrinfo *evutil_new_addrinfo(struct sockaddr *sa,
1.249 + ev_socklen_t socklen, const struct evutil_addrinfo *hints);
1.250 +struct evutil_addrinfo *evutil_addrinfo_append(struct evutil_addrinfo *first,
1.251 + struct evutil_addrinfo *append);
1.252 +void evutil_adjust_hints_for_addrconfig(struct evutil_addrinfo *hints);
1.253 +int evutil_getaddrinfo_common(const char *nodename, const char *servname,
1.254 + struct evutil_addrinfo *hints, struct evutil_addrinfo **res, int *portnum);
1.255 +
1.256 +int evutil_getaddrinfo_async(struct evdns_base *dns_base,
1.257 + const char *nodename, const char *servname,
1.258 + const struct evutil_addrinfo *hints_in,
1.259 + void (*cb)(int, struct evutil_addrinfo *, void *), void *arg);
1.260 +
1.261 +/** Return true iff sa is a looback address. (That is, it is 127.0.0.1/8, or
1.262 + * ::1). */
1.263 +int evutil_sockaddr_is_loopback(const struct sockaddr *sa);
1.264 +
1.265 +
1.266 +/**
1.267 + Formats a sockaddr sa into a string buffer of size outlen stored in out.
1.268 + Returns a pointer to out. Always writes something into out, so it's safe
1.269 + to use the output of this function without checking it for NULL.
1.270 + */
1.271 +const char *evutil_format_sockaddr_port(const struct sockaddr *sa, char *out, size_t outlen);
1.272 +
1.273 +long evutil_tv_to_msec(const struct timeval *tv);
1.274 +
1.275 +int evutil_hex_char_to_int(char c);
1.276 +
1.277 +#ifdef WIN32
1.278 +HANDLE evutil_load_windows_system_library(const TCHAR *library_name);
1.279 +#endif
1.280 +
1.281 +#ifndef EV_SIZE_FMT
1.282 +#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__)
1.283 +#define EV_U64_FMT "%I64u"
1.284 +#define EV_I64_FMT "%I64d"
1.285 +#define EV_I64_ARG(x) ((__int64)(x))
1.286 +#define EV_U64_ARG(x) ((unsigned __int64)(x))
1.287 +#else
1.288 +#define EV_U64_FMT "%llu"
1.289 +#define EV_I64_FMT "%lld"
1.290 +#define EV_I64_ARG(x) ((long long)(x))
1.291 +#define EV_U64_ARG(x) ((unsigned long long)(x))
1.292 +#endif
1.293 +#endif
1.294 +
1.295 +#ifdef _WIN32
1.296 +#define EV_SOCK_FMT EV_I64_FMT
1.297 +#define EV_SOCK_ARG(x) EV_I64_ARG((x))
1.298 +#else
1.299 +#define EV_SOCK_FMT "%d"
1.300 +#define EV_SOCK_ARG(x) (x)
1.301 +#endif
1.302 +
1.303 +#if defined(__STDC__) && defined(__STDC_VERSION__)
1.304 +#if (__STDC_VERSION__ >= 199901L)
1.305 +#define EV_SIZE_FMT "%zu"
1.306 +#define EV_SSIZE_FMT "%zd"
1.307 +#define EV_SIZE_ARG(x) (x)
1.308 +#define EV_SSIZE_ARG(x) (x)
1.309 +#endif
1.310 +#endif
1.311 +
1.312 +#ifndef EV_SIZE_FMT
1.313 +#if (_EVENT_SIZEOF_SIZE_T <= _EVENT_SIZEOF_LONG)
1.314 +#define EV_SIZE_FMT "%lu"
1.315 +#define EV_SSIZE_FMT "%ld"
1.316 +#define EV_SIZE_ARG(x) ((unsigned long)(x))
1.317 +#define EV_SSIZE_ARG(x) ((long)(x))
1.318 +#else
1.319 +#define EV_SIZE_FMT EV_U64_FMT
1.320 +#define EV_SSIZE_FMT EV_I64_FMT
1.321 +#define EV_SIZE_ARG(x) EV_U64_ARG(x)
1.322 +#define EV_SSIZE_ARG(x) EV_I64_ARG(x)
1.323 +#endif
1.324 +#endif
1.325 +
1.326 +#ifdef __cplusplus
1.327 +}
1.328 +#endif
1.329 +
1.330 +#endif
