Add the rest of the kernel support for the sem_ API in kern/uipc_sem.c.

Option 'P1003_1B_SEMAPHORES' to compile them in, or load the "sem" module
to activate them.

Have kern/makesyscalls.sh emit an include for sys/_semaphore.h into sysproto.h
to pull in the typedef for semid_t.

Add the syscalls to the syscall table as module stubs.

3 files changed, 84 insertions, 1 deletions

diff --git a/sys/posix4/_semaphore.h b/sys/posix4/_semaphore.h
new file mode 100644
index 0000000..0024c72
--- /dev/null
+++ b/sys/posix4/_semaphore.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$FreeBSD$
+ */
+#ifndef __SEMAPHORE_H_
+#define __SEMAPHORE_H_
+
+typedef intptr_t semid_t;
+
+#ifndef _KERNEL
+
+#include <sys/cdefs.h>
+
+/*
+ * Semaphore definitions.
+ */
+struct sem {
+#define SEM_MAGIC       ((u_int32_t) 0x09fa4012)
+        u_int32_t       magic;
+        pthread_mutex_t lock;
+        pthread_cond_t  gtzero;
+        u_int32_t       count;
+        u_int32_t       nwaiters;
+#define SEM_USER        (NULL)
+        semid_t         semid;  /* semaphore id if kernel (shared) semaphore */
+        int             syssem; /* 1 if kernel (shared) semaphore */
+        LIST_ENTRY(sem) entry;
+        struct sem      **backpointer;
+};
+
+__BEGIN_DECLS
+
+int ksem_close(semid_t id);
+int ksem_post(semid_t id);
+int ksem_wait(semid_t id);
+int ksem_trywait(semid_t id);
+int ksem_init(semid_t *idp, unsigned int value);
+int ksem_open(semid_t *idp, const char *name, int oflag, mode_t mode,
+    unsigned int value);
+int ksem_unlink(const char *name);
+int ksem_getvalue(semid_t id, int *val);
+int ksem_destroy(semid_t id);
+
+__END_DECLS
+
+#endif /* !_KERNEL */
+
+#endif /* __SEMAPHORE_H_ */
diff --git a/sys/posix4/posix4.h b/sys/posix4/posix4.h
index 9b3c66e..9efd1d9 100644
--- a/sys/posix4/posix4.h
+++ b/sys/posix4/posix4.h
@@ -64,6 +64,7 @@ MALLOC_DECLARE(M_P31B);
 int p31b_proc(struct proc *, pid_t, struct proc **);
 
 void p31b_setcfg(int, int);
+int p31b_getcfg(int);
 
 #ifdef _KPOSIX_PRIORITY_SCHEDULING
 
diff --git a/sys/posix4/posix4_mib.c b/sys/posix4/posix4_mib.c
index 09af27d..d368593 100644
--- a/sys/posix4/posix4_mib.c
+++ b/sys/posix4/posix4_mib.c
@@ -92,12 +92,23 @@ P1B_SYSCTL(CTL_P1003_1B_TIMER_MAX, timer_max);
 
 /* p31b_setcfg: Set the configuration
  */
-void p31b_setcfg(int num, int value)
+void
+p31b_setcfg(int num, int value)
 {
+
 	if (num >= 1 && num < CTL_P1003_1B_MAXID)
 		facility[num - 1] = value;
 }
 
+int
+p31b_getcfg(int num)
+{
+
+	if (num >= 1 && num < CTL_P1003_1B_MAXID)
+		return (facility[num - 1]);
+	return (0);
+}
+
 /*
  * Turn on indications for standard (non-configurable) kernel features.
  */