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>
---
 .../options/posix/generic/sys-select-stubs.cpp     | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 lib/mlibc/options/posix/generic/sys-select-stubs.cpp

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

diff --git a/lib/mlibc/options/posix/generic/sys-select-stubs.cpp b/lib/mlibc/options/posix/generic/sys-select-stubs.cpp
new file mode 100644
index 0000000..e8ff927
--- /dev/null
+++ b/lib/mlibc/options/posix/generic/sys-select-stubs.cpp
@@ -0,0 +1,58 @@
+
+#include <string.h>
+#include <sys/select.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <bits/ensure.h>
+#include <mlibc-config.h>
+
+#include <mlibc/posix-sysdeps.hpp>
+
+void __FD_CLR(int fd, fd_set *set) {
+	__ensure(fd < FD_SETSIZE);
+	set->__mlibc_elems[fd / 8] &= ~(1 << (fd % 8));
+}
+int __FD_ISSET(int fd, fd_set *set) {
+	__ensure(fd < FD_SETSIZE);
+	return set->__mlibc_elems[fd / 8] & (1 << (fd % 8));
+}
+void __FD_SET(int fd, fd_set *set) {
+	__ensure(fd < FD_SETSIZE);
+	set->__mlibc_elems[fd / 8] |= 1 << (fd % 8);
+}
+void __FD_ZERO(fd_set *set) {
+	memset(set->__mlibc_elems, 0, sizeof(fd_set));
+}
+
+int select(int num_fds, fd_set *__restrict read_set, fd_set *__restrict write_set,
+		fd_set *__restrict except_set, struct timeval *__restrict timeout) {
+	int num_events = 0;
+	struct timespec timeouts = {};
+	struct timespec *timeout_ptr = NULL;
+	if (timeout) {
+		timeouts.tv_sec = timeout->tv_sec;
+		timeouts.tv_nsec = timeout->tv_usec * 1000;
+		timeout_ptr = &timeouts;
+	}
+
+    MLIBC_CHECK_OR_ENOSYS(mlibc::sys_pselect, -1);
+	if(int e = mlibc::sys_pselect(num_fds, read_set, write_set, except_set,
+				timeout_ptr, NULL, &num_events); e) {
+		errno = e;
+		return -1;
+	}
+	return num_events;
+}
+
+int pselect(int num_fds, fd_set *read_set, fd_set *write_set, fd_set *except_set,
+		const struct timespec *timeout,	const sigset_t *sigmask) {
+	int num_events = 0;
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_pselect, -1);
+	if(int e = mlibc::sys_pselect(num_fds, read_set, write_set, except_set,
+				timeout, sigmask, &num_events); e) {
+		errno = e;
+		return -1;
+	}
+	return num_events;
+}
-- 
cgit v1.2.3