2 files changed, 81 insertions, 1 deletions
diff --git a/src/include/port/darwin.h b/src/include/port/darwin.h
index 597b998a017..5d5072aa550 100644
--- a/src/include/port/darwin.h
+++ b/src/include/port/darwin.h
@@ -1,5 +1,10 @@
+#define __darwin__  1
+
+#if defined(__ppc__)
 #define HAS_TEST_AND_SET
-#if defined(__powerpc__)
+#endif
+
+#if defined(__ppc__)
 typedef unsigned int slock_t;
 #else
 typedef unsigned char slock_t;
diff --git a/src/include/port/darwin/sem.h b/src/include/port/darwin/sem.h
new file mode 100644
index 00000000000..9e3e28d646a
--- /dev/null
+++ b/src/include/port/darwin/sem.h
@@ -0,0 +1,75 @@
+/*-------------------------------------------------------------------------
+ *
+ * sem.h
+ *	  System V Semaphore Emulation
+ *
+ * Copyright (c) 1999, repas AEG Automation GmbH
+ *
+ *
+ * IDENTIFICATION
+ *       $Header: /cvsroot/pgsql/src/include/port/darwin/Attic/sem.h,v 1.1 2000/12/11 00:49:53 tgl Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef _SYS_SEM_H
+#define _SYS_SEM_H
+
+/* #define DEBUG_IPC here if you want to see the shim in action */
+
+#include <sys/ipc.h>
+
+#ifdef __cplusplus
+extern		"C"
+{
+#endif
+
+/*
+ *	Semctl Command Definitions.
+ */
+
+#define GETNCNT 3				/* get semncnt */
+#define GETPID	4				/* get sempid */
+#define GETVAL	5				/* get semval */
+#define GETALL	6				/* get all semval's */
+#define GETZCNT 7				/* get semzcnt */
+#define SETVAL	8				/* set semval */
+#define SETALL	9				/* set all semval's */
+
+#ifndef ushort_t
+#define ushort_t unsigned int
+#endif
+
+/*
+ *	There is one semaphore structure for each semaphore in the system.
+ */
+
+	struct sem
+	{
+		ushort_t	semval;		/* semaphore text map address	*/
+		pid_t		sempid;		/* pid of last operation	*/
+		ushort_t	semncnt;	/* # awaiting semval > cval */
+		ushort_t	semzcnt;	/* # awaiting semval = 0	*/
+	};
+
+/*
+ * User semaphore template for semop system calls.
+ */
+
+	struct sembuf
+	{
+		ushort_t	sem_num;	/* semaphore #			*/
+		short		sem_op;		/* semaphore operation		*/
+		short		sem_flg;	/* operation flags		*/
+	};
+
+	extern int	semctl(int semid, int semnum, int cmd, /* ... */ union semun arg);
+	extern int	semget(key_t key, int nsems, int semflg);
+	extern int	semop(int semid, struct sembuf * sops, size_t nsops);
+
+#ifdef __cplusplus
+}
+
+#endif
+
+#endif	 /* _SYS_SEM_H */