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Rework libpq threaded SIGPIPE handling to avoid interference with

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calling applications.  This is done by blocking sigpipe in the libpq
thread and using sigpending/sigwait to possibily discard any sigpipe we
generated.
This commit is contained in:
Bruce Momjian
2004-12-02 15:32:54 +00:00
parent e02ef267fc
commit 8408f65252
9 changed files with 113 additions and 105 deletions
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13
src/interfaces/libpq/libpq-int.h
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@@ -12,7 +12,7 @@
* Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.96 2004/10/30 23:11:27 tgl Exp $
* $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.97 2004/12/02 15:32:54 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -31,6 +31,7 @@
#ifdef ENABLE_THREAD_SAFETY
#include <pthread.h>
#include <signal.h>
#endif
#ifdef WIN32_CLIENT_ONLY
@@ -475,15 +476,15 @@ extern void pqsecure_close(PGconn *);
extern ssize_t pqsecure_read(PGconn *, void *ptr, size_t len);
extern ssize_t pqsecure_write(PGconn *, const void *ptr, size_t len);
#ifdef ENABLE_THREAD_SAFETY
extern void pq_check_sigpipe_handler(void);
extern pthread_key_t pq_thread_in_send;
#endif
#ifdef USE_SSL
extern bool pq_initssllib;
#endif
#ifdef ENABLE_THREAD_SAFETY
int pq_block_sigpipe(sigset_t *osigset, bool *sigpipe_pending);
int pq_reset_sigpipe(sigset_t *osigset, bool sigpipe_pending);
#endif
/*
* this is so that we can check if a connection is non-blocking internally
* without the overhead of a function call