44 lines
1.7 KiB
C
44 lines
1.7 KiB
C
/* These definitions are destined for pmachine.h, they are herer to
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prevent LONG recompile's and can be moved when stable */
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/*
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* This file determines how we handle various approaches to multithreading
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* or timing out on TCP opens.
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* The appropriate approaches for the single-threaded and multi-threaded
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* cases are different.
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*/
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/* Several different approaches to handling timeouts
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1. Do nothing - (old prospero) - problems occur when prospero is used
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mostly for gatewaying since connect could take 2 mins to time out,
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leaving hte gateway program to wait - or even worse, timeout itself.
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2. Use SIGALRM - this works on SCOUNIX, and probably on most others
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it does NOT work on SOLARIS2.3 mutli-threaded, probably due to
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problems in the call to signal (at least that is where it crashes).
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3. Non-blocking, works fast, since it doesnt need to wait for connects,
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but this is probably not relevant on gateways. It still has the problems
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of (1). SWA reports problems with this in opentcp.c
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4. Non-blocking and waiting, run non-blocking, but wait (using select) at
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crucial points. - Currently used by Mitra for AOL
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*/
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/* For Approach 1 - undef all of these */
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#undef TIMEOUT_APPROACH /*Approach 2*/
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#undef NONBLOCKING_APPROACH /*Approach 3*/
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#define SELECT_APPROACH /*Approach 4*/
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/* SETSOCKOPTS are generally usefull, but they will fail under SOLARIS 2.3
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setting Errno to the ambiguous "0" */
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#ifndef SOLARIS
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#define SETSOCKOPTS /* Set various socket options */
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#endif
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/* This should go in pfs.h */
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extern wait_till_readable(int fd, int timeout);
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/* Open a stream (or start an opening of a stream). Returns a filedescriptor
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* or -1.
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*/
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extern int p_open_tcp_stream(const char host[], int port);
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