kernel: time: Introduce SYS_sleep

Add SYS_sleep to put a thread to sleep for some time through a timespec

Signed-off-by: Ian Moffett <ian@osmora.org>

4 files changed, 85 insertions, 0 deletions

diff --git a/sys/include/sys/syscall.h b/sys/include/sys/syscall.h
index 37e2286..6d9dae6 100644
--- a/sys/include/sys/syscall.h
+++ b/sys/include/sys/syscall.h
@@ -52,6 +52,7 @@
 #define SYS_munmap  11
 #define SYS_access  12
 #define SYS_lseek   13
+#define SYS_sleep   14
 
 #if defined(_KERNEL)
 /* Syscall return value and arg type */
diff --git a/sys/include/sys/time.h b/sys/include/sys/time.h
index fb98b9d..8563fc7 100644
--- a/sys/include/sys/time.h
+++ b/sys/include/sys/time.h
@@ -31,6 +31,9 @@
 #define _SYS_TIME_H_
 
 #include <sys/types.h>
+#if defined(_KERNEL)
+#include <sys/syscall.h>
+#endif  /* _KERNEL */
 
 struct timeval {
     time_t tv_sec;
@@ -48,4 +51,7 @@ struct date {
     uint8_t hour;
 };
 
+#if defined(_KERNEL)
+scret_t sys_sleep(struct syscall_args *scargs);
+#endif
 #endif  /* !_SYS_TIME_H_ */
diff --git a/sys/kern/kern_syscall.c b/sys/kern/kern_syscall.c
index aaa5d04..b1deb7a 100644
--- a/sys/kern/kern_syscall.c
+++ b/sys/kern/kern_syscall.c
@@ -31,6 +31,7 @@
 #include <sys/sysctl.h>
 #include <sys/reboot.h>
 #include <sys/types.h>
+#include <sys/time.h>
 #include <sys/mman.h>
 #include <sys/proc.h>
 #include <sys/vfs.h>
@@ -50,6 +51,7 @@ scret_t(*g_sctab[])(struct syscall_args *) = {
     sys_munmap, /* SYS_munap */
     sys_access, /* SYS_access */
     sys_lseek,  /* SYS_lseek */
+    sys_sleep,  /* SYS_sleep */
 };
 
 const size_t MAX_SYSCALLS = NELEM(g_sctab);
diff --git a/sys/kern/kern_time.c b/sys/kern/kern_time.c
new file mode 100644
index 0000000..102648c
--- /dev/null
+++ b/sys/kern/kern_time.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * 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.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/syscall.h>
+#include <sys/systm.h>
+#include <sys/errno.h>
+#include <sys/cdefs.h>
+#include <dev/timer.h>
+#include <machine/cdefs.h>
+
+/*
+ * arg0: Timespec
+ * arg1: Remaining timeval
+ */
+scret_t
+sys_sleep(struct syscall_args *scargs)
+{
+    struct timespec ts;
+    struct timer tmr;
+    size_t timeout_msec;
+    tmrr_status_t status;
+    int error;
+
+    error = copyin((void *)scargs->arg0, &ts, sizeof(ts));
+    if (error < 0) {
+        return error;
+    }
+
+    if (ts.tv_nsec >= 1000000000) {
+        return -EINVAL;
+    }
+
+    status = req_timer(TIMER_GP, &tmr);
+    if (__unlikely(status != TMRR_SUCCESS)) {
+        return -ENOTSUP;
+    }
+    if (__unlikely(tmr.msleep == NULL)) {
+        return -ENOTSUP;
+    }
+
+    timeout_msec = ts.tv_nsec / 1000000;
+    timeout_msec += ts.tv_sec * 1000;
+
+    md_inton();
+    tmr.msleep(timeout_msec);
+    md_intoff();
+    return 0;
+}