From 3231a1296d7194f85451f0b2f9d048c845705c5b Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Fri, 5 Jan 2024 22:15:06 +0100
Subject: [PATCH] libc: Add support for POSIX timers

---
 libc/include/time.h | 15 +++++++++++++++
 libc/src/time.cpp   | 24 ++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/libc/include/time.h b/libc/include/time.h
index 3e725293..2e1ae73b 100644
--- a/libc/include/time.h
+++ b/libc/include/time.h
@@ -4,8 +4,11 @@
 #define _TIME_H
 
 #include <bits/clockid.h>
+#include <bits/itimer.h>
+#include <bits/sigevent.h>
 #include <bits/struct_tm.h>
 #include <bits/timespec.h>
+#include <sys/types.h>
 
 typedef long int clock_t;
 
@@ -58,6 +61,18 @@ extern "C"
     /* Estimate the CPU time used by a process. */
     clock_t clock(void);
 
+    /* Create a new POSIX timer. */
+    int timer_create(clockid_t clockid, struct sigevent* sevp, timer_t* timerid);
+
+    /* Get the current time remaining for a POSIX timer. */
+    int timer_gettime(timer_t timerid, struct itimerspec* value);
+
+    /* Set the time remaining and interval for a POSIX timer. */
+    int timer_settime(timer_t timerid, int flags, const struct itimerspec* new_value, struct itimerspec* old_value);
+
+    /* Delete an existing POSIX timer. */
+    int timer_delete(timer_t timerid);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libc/src/time.cpp b/libc/src/time.cpp
index 3f2bb102..238663b6 100644
--- a/libc/src/time.cpp
+++ b/libc/src/time.cpp
@@ -206,4 +206,28 @@ extern "C"
         long rc = syscall(SYS_setitimer, which, new_timer, old_timer);
         __errno_return(rc, int);
     }
+
+    int timer_create(clockid_t clockid, struct sigevent* sevp, timer_t* timerid)
+    {
+        long rc = syscall(SYS_timer_create, clockid, sevp, timerid);
+        __errno_return(rc, int);
+    }
+
+    int timer_gettime(timer_t timerid, struct itimerspec* value)
+    {
+        long rc = syscall(SYS_timer_gettime, timerid, value);
+        __errno_return(rc, int);
+    }
+
+    int timer_settime(timer_t timerid, int flags, const struct itimerspec* new_value, struct itimerspec* old_value)
+    {
+        long rc = syscall(SYS_timer_settime, timerid, flags, new_value, old_value);
+        __errno_return(rc, int);
+    }
+
+    int timer_delete(timer_t timerid)
+    {
+        long rc = syscall(SYS_timer_delete, timerid);
+        __errno_return(rc, int);
+    }
 }