From bd5969fc876a10b18613302db7087ef3c40f18e1 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 7 Mar 2024 17:28:00 -0500
Subject: lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 lib/mlibc/options/posix/generic/sys-sem.cpp | 51 +++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 lib/mlibc/options/posix/generic/sys-sem.cpp

(limited to 'lib/mlibc/options/posix/generic/sys-sem.cpp')

diff --git a/lib/mlibc/options/posix/generic/sys-sem.cpp b/lib/mlibc/options/posix/generic/sys-sem.cpp
new file mode 100644
index 0000000..ac3df69
--- /dev/null
+++ b/lib/mlibc/options/posix/generic/sys-sem.cpp
@@ -0,0 +1,51 @@
+
+#include <bits/ensure.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/sem.h>
+
+#include <mlibc/posix-sysdeps.hpp>
+
+int semget(key_t key, int n, int fl) {
+	if(n > USHRT_MAX) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	int id = 0;
+	auto sysdep = MLIBC_CHECK_OR_ENOSYS(mlibc::sys_semget, -1);
+	if(int e = sysdep(key, n, fl, &id); e) {
+		errno = e;
+		return -1;
+	}
+	return id;
+}
+
+int semop(int, struct sembuf *, size_t) {
+	__ensure(!"Not implemented");
+	__builtin_unreachable();
+}
+
+union semun {
+	int val;
+	struct semid_ds *buf;
+	unsigned short *array;
+};
+
+int semctl(int id, int num, int cmd, ...) {
+	union semun semun;
+	int ret = 0;
+
+	va_list ap;
+	va_start(ap, cmd);
+	semun = va_arg(ap, union semun);
+	va_end(ap);
+
+	auto sysdep = MLIBC_CHECK_OR_ENOSYS(mlibc::sys_semctl, -1);
+	if(int e = sysdep(id, num, cmd, semun.buf, &ret); e) {
+		errno = e;
+		return -1;
+	}
+
+	return ret;
+}
-- 
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