diff options
Diffstat (limited to 'usr/src/lib/libast/common/sfio/sfexcept.c')
| -rw-r--r-- | usr/src/lib/libast/common/sfio/sfexcept.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/usr/src/lib/libast/common/sfio/sfexcept.c b/usr/src/lib/libast/common/sfio/sfexcept.c deleted file mode 100644 index b2025a8122..0000000000 --- a/usr/src/lib/libast/common/sfio/sfexcept.c +++ /dev/null @@ -1,133 +0,0 @@ -/*********************************************************************** -* * -* This software is part of the ast package * -* Copyright (c) 1985-2010 AT&T Intellectual Property * -* and is licensed under the * -* Common Public License, Version 1.0 * -* by AT&T Intellectual Property * -* * -* A copy of the License is available at * -* http://www.opensource.org/licenses/cpl1.0.txt * -* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * -* * -* Information and Software Systems Research * -* AT&T Research * -* Florham Park NJ * -* * -* Glenn Fowler <gsf@research.att.com> * -* David Korn <dgk@research.att.com> * -* Phong Vo <kpv@research.att.com> * -* * -***********************************************************************/ -#include "sfhdr.h" - -/* Function to handle io exceptions. -** Written by Kiem-Phong Vo -*/ - -#if __STD_C -int _sfexcept(Sfio_t* f, int type, ssize_t io, Sfdisc_t* disc) -#else -int _sfexcept(f,type,io,disc) -Sfio_t* f; /* stream where the exception happened */ -int type; /* io type that was performed */ -ssize_t io; /* the io return value that indicated exception */ -Sfdisc_t* disc; /* discipline in use */ -#endif -{ - reg int ev, local, lock; - reg ssize_t size; - reg uchar* data; - SFMTXDECL(f); - - SFMTXENTER(f,-1); - - GETLOCAL(f,local); - lock = f->mode&SF_LOCK; - - if(local && io <= 0) - f->flags |= io < 0 ? SF_ERROR : SF_EOF; - - if(disc && disc->exceptf) - { /* let the stream be generally accessible for this duration */ - if(local && lock) - SFOPEN(f,0); - - /* so that exception handler knows what we are asking for */ - _Sfi = f->val = io; - ev = (*(disc->exceptf))(f,type,&io,disc); - - /* relock if necessary */ - if(local && lock) - SFLOCK(f,0); - - if(io > 0 && !(f->flags&SF_STRING) ) - SFMTXRETURN(f, ev); - if(ev < 0) - SFMTXRETURN(f, SF_EDONE); - if(ev > 0) - SFMTXRETURN(f, SF_EDISC); - } - - if(f->flags&SF_STRING) - { if(type == SF_READ) - goto chk_stack; - else if(type != SF_WRITE && type != SF_SEEK) - SFMTXRETURN(f, SF_EDONE); - if(local && io >= 0) - { if(f->size >= 0 && !(f->flags&SF_MALLOC)) - goto chk_stack; - /* extend buffer */ - if((size = f->size) < 0) - size = 0; - if((io -= size) <= 0) - io = SF_GRAIN; - size = ((size+io+SF_GRAIN-1)/SF_GRAIN)*SF_GRAIN; - if(f->size > 0) - data = (uchar*)realloc((char*)f->data,size); - else data = (uchar*)malloc(size); - if(!data) - goto chk_stack; - f->endb = data + size; - f->next = data + (f->next - f->data); - f->endr = f->endw = f->data = data; - f->size = size; - } - SFMTXRETURN(f, SF_EDISC); - } - - if(errno == EINTR) - { if(_Sfexiting || (f->bits&SF_ENDING) || /* stop being a hero */ - (f->flags&SF_IOINTR) ) /* application requests to return */ - SFMTXRETURN(f, SF_EDONE); - - /* a normal interrupt, we can continue */ - errno = 0; - f->flags &= ~(SF_EOF|SF_ERROR); - SFMTXRETURN(f, SF_ECONT); - } - -chk_stack: - if(local && f->push && - ((type == SF_READ && f->next >= f->endb) || - (type == SF_WRITE && f->next <= f->data))) - { /* pop the stack */ - reg Sfio_t *pf; - - if(lock) - SFOPEN(f,0); - - /* pop and close */ - pf = (*_Sfstack)(f,NIL(Sfio_t*)); - if((ev = sfclose(pf)) < 0) /* can't close, restack */ - (*_Sfstack)(f,pf); - - if(lock) - SFLOCK(f,0); - - ev = ev < 0 ? SF_EDONE : SF_ESTACK; - } - else ev = SF_EDONE; - - SFMTXRETURN(f, ev); -} |