1 /* 2 * Copyright (c) 2009, Sun Microsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * - Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * - Neither the name of Sun Microsystems, Inc. nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <wintirpc.h> 30 //#include <unistd.h> 31 32 //#include <sys/select.h> 33 34 int _rpc_dtablesize(void); /* XXX */ 35 36 /* 37 * Cache the result of getdtablesize(), so we don't have to do an 38 * expensive system call every time. 39 */ 40 /* 41 * XXX In FreeBSD 2.x, you can have the maximum number of open file 42 * descriptors be greater than FD_SETSIZE (which is 256 by default). 43 * 44 * Since old programs tend to use this call to determine the first arg 45 * for _select(), having this return > FD_SETSIZE is a Bad Idea(TM)! 46 */ 47 int 48 _rpc_dtablesize(void) 49 { 50 #ifdef _WIN32 51 return FD_SETSIZE; 52 #else 53 static int size; 54 55 if (size == 0) { 56 size = getdtablesize(); 57 if (size > FD_SETSIZE) 58 size = FD_SETSIZE; 59 } 60 return (size); 61 #endif 62 } 63