Add a test case for waitpid(): from Rocco Caputo.

p4raw-id: //depot/perl@13577

1 files changed, 88 insertions, 0 deletions

diff --git a/ext/POSIX/t/waitpid.t b/ext/POSIX/t/waitpid.t
new file mode 100644
index 0000000000..1263673bd3
--- /dev/null
+++ b/ext/POSIX/t/waitpid.t
@@ -0,0 +1,88 @@
+BEGIN {
+	chdir 't' if -d 't';
+	unshift @INC, '../lib';
+}
+
+BEGIN {
+    use Config;
+    unless ($Config{d_fork}) {
+	print "1..0 # no fork\n";
+	exit 0;
+    }
+    eval { use POSIX qw(sys_wait_h) };
+    if ($@) {
+	print "1..0 # no POSIX sys_wait_h\n";
+	exit 0;
+    }
+    eval { use Time::HiRes };
+    if ($@) {
+	print "1..0 # no Time::HiRes\n";
+	exit 0;
+    }
+}
+
+use warnings;
+use strict;
+
+use Time::HiRes qw(time);
+
+$| = 1;
+
+sub NEG1_PROHIBITED () { 0x01 }
+sub NEG1_REQUIRED   () { 0x02 }
+
+my $count     = 0;
+my $max_count = 9;
+my $state     = NEG1_PROHIBITED;
+
+my $child_pid = fork();
+
+# Parent receives a nonzero child PID.
+
+if ($child_pid) {
+    my $ok = 1;
+
+    while ($count++ < $max_count) {   
+	my $begin_time = time();        
+	my $ret = waitpid( -1, WNOHANG );          
+	my $elapsed_time = time() - $begin_time;
+	
+	printf( "# waitpid(-1,WNOHANG) returned %d after %.2f seconds\n",
+		$ret, $elapsed_time );
+	if ($elapsed_time > 0.5) {
+	    printf( "# %.2f seconds in non-blocking waitpid is too long!\n",
+		    $elapsed_time );
+	    $ok = 0;
+	    last;
+	}
+	
+	if ($state & NEG1_PROHIBITED) { 
+	    if ($ret == -1) {
+		print "# waitpid should not have returned -1 here!\n";
+		$ok = 0;
+		last;
+	    }
+	    elsif ($ret == $child_pid) {
+		$state = NEG1_REQUIRED;
+	    }
+	}
+	elsif ($state & NEG1_REQUIRED) {
+	    unless ($ret == -1) {
+		print "# waitpid should have returned -1 here\n";
+		$ok = 0;
+	    }
+	    last;
+	}
+	
+	sleep(1);
+    }
+    print $ok ? "ok 1\n" : "not ok 1\n";
+    exit(0); # parent 
+} else {
+    # Child receives a zero PID and can request parent's PID with
+    # getppid().
+    sleep(3);
+    exit(0);
+}
+
+