1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #include "sfdchdr.h" 23*4887Schin 24*4887Schin /* Make a stream op return immediately on interrupts. 25*4887Schin ** This is useful on slow streams (hence the name). 26*4887Schin ** 27*4887Schin ** Written by Glenn Fowler (03/18/1998). 28*4887Schin */ 29*4887Schin 30*4887Schin #if __STD_C 31*4887Schin static int slowexcept(Sfio_t* f, int type, Void_t* v, Sfdisc_t* disc) 32*4887Schin #else 33*4887Schin static int slowexcept(f, type, v, disc) 34*4887Schin Sfio_t* f; 35*4887Schin int type; 36*4887Schin Void_t* v; 37*4887Schin Sfdisc_t* disc; 38*4887Schin #endif 39*4887Schin { 40*4887Schin NOTUSED(f); 41*4887Schin NOTUSED(v); 42*4887Schin NOTUSED(disc); 43*4887Schin 44*4887Schin switch (type) 45*4887Schin { 46*4887Schin case SF_FINAL: 47*4887Schin case SF_DPOP: 48*4887Schin free(disc); 49*4887Schin break; 50*4887Schin case SF_READ: 51*4887Schin case SF_WRITE: 52*4887Schin if (errno == EINTR) 53*4887Schin return(-1); 54*4887Schin break; 55*4887Schin } 56*4887Schin 57*4887Schin return(0); 58*4887Schin } 59*4887Schin 60*4887Schin #if __STD_C 61*4887Schin int sfdcslow(Sfio_t* f) 62*4887Schin #else 63*4887Schin int sfdcslow(f) 64*4887Schin Sfio_t* f; 65*4887Schin #endif 66*4887Schin { 67*4887Schin Sfdisc_t* disc; 68*4887Schin 69*4887Schin if(!(disc = (Sfdisc_t*)malloc(sizeof(Sfdisc_t))) ) 70*4887Schin return(-1); 71*4887Schin 72*4887Schin disc->readf = NIL(Sfread_f); 73*4887Schin disc->writef = NIL(Sfwrite_f); 74*4887Schin disc->seekf = NIL(Sfseek_f); 75*4887Schin disc->exceptf = slowexcept; 76*4887Schin 77*4887Schin if(sfdisc(f,disc) != disc) 78*4887Schin { free(disc); 79*4887Schin return(-1); 80*4887Schin } 81*4887Schin 82*4887Schin return(0); 83*4887Schin } 84