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-time-stubs.cpp | 107 +++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 lib/mlibc/options/posix/generic/sys-time-stubs.cpp

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

diff --git a/lib/mlibc/options/posix/generic/sys-time-stubs.cpp b/lib/mlibc/options/posix/generic/sys-time-stubs.cpp
new file mode 100644
index 0000000..5cc0fe5
--- /dev/null
+++ b/lib/mlibc/options/posix/generic/sys-time-stubs.cpp
@@ -0,0 +1,107 @@
+
+#include <errno.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include <bits/ensure.h>
+#include <mlibc/debug.hpp>
+#include <mlibc/posix-sysdeps.hpp>
+
+int gettimeofday(struct timeval *__restrict result, void *__restrict unused) {
+	(void)unused; // Linux just ignores gettimeofday().
+
+	if(result) {
+		long nanos;
+		if(int e = mlibc::sys_clock_get(CLOCK_REALTIME, &result->tv_sec, &nanos); e) {
+			errno = e;
+			return -1;
+		}
+		result->tv_usec = nanos / 1000;
+	}
+	return 0;
+}
+
+int settimeofday(const struct timeval *, const struct timezone *) {
+	__ensure(!"Not implemented");
+	__builtin_unreachable();
+}
+
+void timeradd(const struct timeval *a, const struct timeval *b, struct timeval *res) {
+	res->tv_sec = a->tv_sec + b->tv_sec;
+	res->tv_usec = a->tv_usec + b->tv_usec;
+	while(res->tv_usec > 999999) {
+		res->tv_usec -= 1000000;
+		res->tv_sec += 1;
+	}
+}
+
+void timersub(const struct timeval *a, const struct timeval *b, struct timeval *res) {
+	res->tv_sec = a->tv_sec - b->tv_sec;
+	res->tv_usec = a->tv_usec - b->tv_usec;
+	while(res->tv_usec < 0) {
+		res->tv_usec += 1000000;
+		res->tv_sec -= 1;
+	}
+}
+
+void timerclear(struct timeval *tvp) {
+	tvp->tv_sec = 0;
+	tvp->tv_usec = 0;
+}
+
+int timerisset(struct timeval *tvp) {
+	if(tvp->tv_sec != 0 || tvp->tv_usec != 0) {
+		return 1;
+	}
+	return 0;
+}
+
+int getitimer(int which, struct itimerval *curr_value) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_getitimer, -1);
+	if(int e = mlibc::sys_getitimer(which, curr_value); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int setitimer(int which, const struct itimerval *new_value, struct itimerval *old_value) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_setitimer, -1);
+	if(int e = mlibc::sys_setitimer(which, new_value, old_value); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int timer_create(clockid_t clk, struct sigevent *__restrict evp, timer_t *__restrict res) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_timer_create, -1);
+	if(int e = mlibc::sys_timer_create(clk, evp, res); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int timer_settime(timer_t t, int flags, const struct itimerspec *__restrict val, struct itimerspec *__restrict old) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_timer_settime, -1);
+	if(int e = mlibc::sys_timer_settime(t, flags, val, old); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int timer_gettime(timer_t, struct itimerspec *) {
+	__ensure(!"Not implemented");
+	__builtin_unreachable();
+}
+
+int timer_delete(timer_t t) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_timer_delete, -1);
+	if(int e = mlibc::sys_timer_delete(t); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
-- 
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