Add PQisthreadsafe() to libpq, to allow library applications to query

the thread-safety status of the library.

3 files changed, 18 insertions, 3 deletions

diff --git a/src/interfaces/libpq/exports.txt b/src/interfaces/libpq/exports.txt
index 7fcd43b01a..b50d062c0b 100644
--- a/src/interfaces/libpq/exports.txt
+++ b/src/interfaces/libpq/exports.txt
@@ -1,4 +1,4 @@
-# $PostgreSQL: pgsql/src/interfaces/libpq/exports.txt,v 1.8 2006/05/21 20:19:23 tgl Exp $
+# $PostgreSQL: pgsql/src/interfaces/libpq/exports.txt,v 1.9 2006/05/23 22:13:19 momjian Exp $
 # Functions to be exported by libpq DLLs
 PQconnectdb               1
 PQsetdbLogin              2
@@ -128,3 +128,5 @@ PQregisterThreadLock      125
 PQescapeStringConn        126
 PQescapeByteaConn         127
 PQencryptPassword         128
+PQisthreadsafe            129
+
diff --git a/src/interfaces/libpq/fe-exec.c b/src/interfaces/libpq/fe-exec.c
index 3139398946..7b999c8533 100644
--- a/src/interfaces/libpq/fe-exec.c
+++ b/src/interfaces/libpq/fe-exec.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.183 2006/05/21 20:19:23 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.184 2006/05/23 22:13:19 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2343,6 +2343,18 @@ PQisnonblocking(const PGconn *conn)
 	return pqIsnonblocking(conn);
 }
 
+/* libpq is thread-safe? */
+int
+PQisthreadsafe(void)
+{
+#ifdef ENABLE_THREAD_SAFETY
+	return true;
+#else
+	return false;
+#endif
+}
+
+
 /* try to force data out, really only useful for non-blocking users */
 int
 PQflush(PGconn *conn)
diff --git a/src/interfaces/libpq/libpq-fe.h b/src/interfaces/libpq/libpq-fe.h
index c309448bac..3b824efe85 100644
--- a/src/interfaces/libpq/libpq-fe.h
+++ b/src/interfaces/libpq/libpq-fe.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-fe.h,v 1.128 2006/05/21 20:19:23 tgl Exp $
+ * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-fe.h,v 1.129 2006/05/23 22:13:19 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -366,6 +366,7 @@ extern int	PQendcopy(PGconn *conn);
 /* Set blocking/nonblocking connection to the backend */
 extern int	PQsetnonblocking(PGconn *conn, int arg);
 extern int	PQisnonblocking(const PGconn *conn);
+extern int	PQisthreadsafe(void);
 
 /* Force the write buffer to be written (or at least try) */
 extern int	PQflush(PGconn *conn);