Support sendfile on solaris: patch from Caitlin Mercer.

svn:r1419

ChangeLog

@@ -14,6 +14,7 @@ Changes in 2.0.3-alpha:
  o Add an evbuffer_search_range() function to search a bounded range of a buffer.
  o Fix a rare crash bug in evdns.
  o Have bufferevent_socket_connect() with no arguments put a bufferevent into connecting mode.
+ o Support sendfile on Solaris: patch from Caitlin Mercer.
 
 
 Changes in 2.0.2-alpha:

buffer.c

@@ -104,6 +104,9 @@
 #elif defined(_EVENT_HAVE_SENDFILE) && defined(__APPLE__)
 #define USE_SENDFILE		1
 #define SENDFILE_IS_MACOSX	1
+#elif defined(_EVENT_HAVE_SENDFILE) && defined(__sun__) && defined(__svr4__)
+#define USE_SENDFILE		1
+#define SENDFILE_IS_SOLARIS	1
 #endif
 
 #ifdef USE_SENDFILE
@@ -1785,7 +1788,7 @@ evbuffer_write_sendfile(struct evbuffer *buffer, evutil_socket_t fd,
 #if defined(SENDFILE_IS_MACOSX) || defined(SENDFILE_IS_FREEBSD)
 	int res;
 	off_t len = chain->off;
-#elif SENDFILE_IS_LINUX
+#elif defined(SENDFILE_IS_LINUX) || defined(SENDFILE_IS_SOLARIS)
 	ev_ssize_t res;
 	off_t offset = chain->misalign;
 #endif
@@ -1812,6 +1815,13 @@ evbuffer_write_sendfile(struct evbuffer *buffer, evutil_socket_t fd,
 		return (0);
 	}
 	return (res);
+#elif defined(SENDFILE_IS_SOLARIS)
+	res = sendfile(fd, info->fd, &offset, chain->off);
+	if (res == -1 && EVUTIL_ERR_RW_RETRIABLE(errno)) {
+		/* if this is EAGAIN or EINTR return 0; otherwise, -1 */
+		return (0);
+	}
+	return (res);
 #endif
 }
 #endif

configure.in

@@ -53,6 +53,7 @@ AC_SEARCH_LIBS([inet_ntoa], [nsl])
 AC_SEARCH_LIBS([socket], [socket])
 AC_SEARCH_LIBS([inet_aton], [resolv])
 AC_SEARCH_LIBS([clock_gettime], [rt])
+AC_SEARCH_LIBS([sendfile], [sendfile])
 
 dnl Determine if we have zlib for regression tests
 dnl Don't put this one in LIBS