Fix linking problem when enabling thread safety on Darwin: uninitialized

global variables are problematic on this platform.  Simplest solution
seems to be to initialize pthread key variable to 0.  Also, rename this
variable and check_sigpipe_handler to something involving "pq" to
avoid gratuitous pollution of application namespace.

src/interfaces/libpq/fe-connect.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-connect.c,v 1.279 2004/08/11 18:06:01 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-connect.c,v 1.280 2004/08/17 04:24:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -886,7 +886,7 @@ connectDBStart(PGconn *conn)
 	static pthread_once_t check_sigpipe_once = PTHREAD_ONCE_INIT;
 
 	/* Check only on first connection request */
-	pthread_once(&check_sigpipe_once, check_sigpipe_handler);
+	pthread_once(&check_sigpipe_once, pq_check_sigpipe_handler);
 #endif
 #endif
 

src/interfaces/libpq/fe-print.c

@@ -10,7 +10,7 @@
  * didn't really belong there.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-print.c,v 1.51 2004/04/19 17:42:59 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-print.c,v 1.52 2004/08/17 04:24:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -188,7 +188,7 @@ PQprint(FILE *fout,
 				{
 					usePipe = 1;
 #ifdef ENABLE_THREAD_SAFETY
-					pthread_setspecific(thread_in_send, "t");
+					pthread_setspecific(pq_thread_in_send, "t");
 #else
 #ifndef WIN32
 					oldsigpipehandler = pqsignal(SIGPIPE, SIG_IGN);
@@ -310,7 +310,7 @@ PQprint(FILE *fout,
 			pclose(fout);
 #endif
 #ifdef ENABLE_THREAD_SAFETY
-			pthread_setspecific(thread_in_send, "f");
+			pthread_setspecific(pq_thread_in_send, "f");
 #else
 #ifndef WIN32
 			pqsignal(SIGPIPE, oldsigpipehandler);

src/interfaces/libpq/fe-secure.c

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-secure.c,v 1.45 2004/07/12 14:23:28 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-secure.c,v 1.46 2004/08/17 04:24:23 tgl Exp $
  *
  * NOTES
  *	  The client *requires* a valid server certificate.  Since
@@ -152,7 +152,7 @@ static SSL_CTX *SSL_context = NULL;
 
 #ifdef ENABLE_THREAD_SAFETY
 static void sigpipe_handler_ignore_send(int signo);
-pthread_key_t thread_in_send;
+pthread_key_t pq_thread_in_send = 0;
 #endif
 
 /* ------------------------------------------------------------ */
@@ -367,7 +367,7 @@ pqsecure_write(PGconn *conn, const void *ptr, size_t len)
 	ssize_t		n;
 
 #ifdef ENABLE_THREAD_SAFETY
-	pthread_setspecific(thread_in_send, "t");
+	pthread_setspecific(pq_thread_in_send, "t");
 #else
 #ifndef WIN32
 	pqsigfunc	oldsighandler = pqsignal(SIGPIPE, SIG_IGN);
@@ -435,7 +435,7 @@ pqsecure_write(PGconn *conn, const void *ptr, size_t len)
 		n = send(conn->sock, ptr, len, 0);
 
 #ifdef ENABLE_THREAD_SAFETY
-	pthread_setspecific(thread_in_send, "f");
+	pthread_setspecific(pq_thread_in_send, "f");
 #else
 #ifndef WIN32
 	pqsignal(SIGPIPE, oldsighandler);
@@ -1188,7 +1188,7 @@ PQgetssl(PGconn *conn)
  *	Check SIGPIPE handler and perhaps install our own.
  */
 void
-check_sigpipe_handler(void)
+pq_check_sigpipe_handler(void)
 {
 	pqsigfunc pipehandler;
 
@@ -1204,7 +1204,7 @@ check_sigpipe_handler(void)
 		 *	Create key first because the signal handler might be called
 		 *	right after being installed.
 		 */
-		pthread_key_create(&thread_in_send, NULL);	
+		pthread_key_create(&pq_thread_in_send, NULL);	
 		pqsignal(SIGPIPE, sigpipe_handler_ignore_send);
 	}
 }
@@ -1236,8 +1236,8 @@ pqbool
 PQinSend(void)
 {
 #ifdef ENABLE_THREAD_SAFETY
-	return (pthread_getspecific(thread_in_send) /* has it been set? */ &&
-			*(char *)pthread_getspecific(thread_in_send) == 't') ? true : false;
+	return (pthread_getspecific(pq_thread_in_send) /* has it been set? */ &&
+			*(char *)pthread_getspecific(pq_thread_in_send) == 't') ? true : false;
 #else
 	/*
 	 *	No threading: our code ignores SIGPIPE around send().

src/interfaces/libpq/libpq-int.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.88 2004/05/31 18:42:40 tgl Exp $
+ * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.89 2004/08/17 04:24:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -456,8 +456,8 @@ 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 check_sigpipe_handler(void);
-extern pthread_key_t thread_in_send;
+extern void pq_check_sigpipe_handler(void);
+extern pthread_key_t pq_thread_in_send;
 #endif
 
 #ifdef USE_SSL