From db9a95761872d9137cd775c3b7b0760365903b5a Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Sat, 27 Mar 2004 23:02:44 +0000
Subject: [PATCH] Add test for thread-safe errno to thread test program.

---
 src/tools/thread/thread_test.c | 52 ++++++++++++++++++++++++++++++++--
 1 file changed, 50 insertions(+), 2 deletions(-)

diff --git a/src/tools/thread/thread_test.c b/src/tools/thread/thread_test.c
index a09c8fca02..f97f89ed2b 100644
--- a/src/tools/thread/thread_test.c
+++ b/src/tools/thread/thread_test.c
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$PostgreSQL: pgsql/src/tools/thread/thread_test.c,v 1.7 2004/02/11 21:44:06 momjian Exp $
+ *	$PostgreSQL: pgsql/src/tools/thread/thread_test.c,v 1.8 2004/03/27 23:02:44 momjian Exp $
  *
  *	This program tests to see if your standard libc functions use
  *	pthread_setspecific()/pthread_getspecific() to be thread-safe.
@@ -29,10 +29,15 @@
 #include <pwd.h>
 #include <string.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <errno.h>
 
 void func_call_1(void);
 void func_call_2(void);
 
+int errno1_set = 0;
+int errno2_set = 0;
+
 char *strerror_p1;
 char *strerror_p2;
 
@@ -42,6 +47,9 @@ struct passwd *passwd_p2;
 struct hostent *hostent_p1;
 struct hostent *hostent_p2;
 
+pthread_mutex_t singlethread_lock1 = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t singlethread_lock2 = PTHREAD_MUTEX_INITIALIZER;
+                            
 int main(int argc, char *argv[])
 {
 	pthread_t		thread1,
@@ -84,7 +92,30 @@ defines to your template/$port file before compiling this program.\n\n"
 
 void func_call_1(void) {
 	void *p;
-
+	
+	if (open("/tmp/thread_test.1", O_RDWR | O_CREAT, 0600) < 0)
+	{
+			fprintf(stderr, "Could not create file in /tmp, exiting\n");
+			exit(1);
+	}
+		
+	if (open("/tmp/thread_test.1", O_RDWR | O_CREAT | O_EXCL, 0600) >= 0)
+	{
+			fprintf(stderr, "Could not generate failure for create file in /tmp, exiting\n");
+			exit(1);
+	}
+	/* wait for other thread to set errno */
+	errno1_set = 1;
+	while (errno2_set == 0)
+		/* loop */;
+	if (errno != EEXIST)
+	{
+			fprintf(stderr, "errno not thread-safe; exiting\n");
+			unlink("/tmp/thread_test.1");
+			exit(1);
+	}
+	unlink("/tmp/thread_test.1");
+	
 	strerror_p1 = strerror(EACCES);
 	/*
 	 *	If strerror() uses sys_errlist, the pointer might change for different
@@ -112,6 +143,23 @@ void func_call_1(void) {
 void func_call_2(void) {
 	void *p;
 
+	unlink("/tmp/thread_test.2");
+	if (open("/tmp/thread_test.2", O_RDONLY, 0600) >= 0)
+	{
+			fprintf(stderr, "Read-only open succeeded without create, exiting\n");
+			exit(1);
+	}
+	/* wait for other thread to set errno */
+	errno2_set = 1;
+	while (errno1_set == 0)
+		/* loop */;
+	if (errno != ENOENT)
+	{
+			fprintf(stderr, "errno not thread-safe; exiting\n");
+			unlink("/tmp/thread_test.A");
+			exit(1);
+	}
+	
 	strerror_p2 = strerror(EINVAL);
 	/*
 	 *	If strerror() uses sys_errlist, the pointer might change for different
-- 
2.40.0