From d763a3829ac503eb180e332f5e2687fba2864945 Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Tue, 6 Jan 2026 19:40:23 -0500
Subject: [PATCH] semaphore.h: Add SEM_VALUE_MAX.

It's specified in POSIX, and FreeBSD puts it in this file.

Distinguish it from _POSIX_SEM_VALUE_MAX (which is really a
"minimum value this can have" as specified in POSIX.)
---
 headers/posix/semaphore.h                        | 3 ++-
 headers/private/system/posix/realtime_sem_defs.h | 1 -
 src/system/kernel/posix/realtime_sem.cpp         | 2 +-
 src/system/libroot/posix/unistd/conf.cpp         | 3 ++-
 4 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/headers/posix/semaphore.h b/headers/posix/semaphore.h
index 67216c7a1c..7ec774102f 100644
--- a/headers/posix/semaphore.h
+++ b/headers/posix/semaphore.h
@@ -21,7 +21,8 @@ typedef struct _sem_t {
 	int32_t padding[2];
 } sem_t;
 
-#define SEM_FAILED	((sem_t*)(long)-1)
+#define SEM_FAILED		((sem_t*)(long)-1)
+#define SEM_VALUE_MAX	INT_MAX
 
 __BEGIN_DECLS
 
diff --git a/headers/private/system/posix/realtime_sem_defs.h b/headers/private/system/posix/realtime_sem_defs.h
index 80b625887c..29f4e2a2d3 100644
--- a/headers/private/system/posix/realtime_sem_defs.h
+++ b/headers/private/system/posix/realtime_sem_defs.h
@@ -11,7 +11,6 @@
 
 #define MAX_POSIX_SEMS_PER_TEAM	_POSIX_SEM_NSEMS_MAX
 #define MAX_POSIX_SEMS			1024
-#define MAX_POSIX_SEM_VALUE		_POSIX_SEM_VALUE_MAX
 
 
 #endif	// SYSTEM_REALTIME_SEM_H
diff --git a/src/system/kernel/posix/realtime_sem.cpp b/src/system/kernel/posix/realtime_sem.cpp
index d78d1b0b34..de53445b82 100644
--- a/src/system/kernel/posix/realtime_sem.cpp
+++ b/src/system/kernel/posix/realtime_sem.cpp
@@ -679,7 +679,7 @@ _user_realtime_sem_open(const char* userName, int openFlagsOrShared,
 	if (context == NULL)
 		return B_NO_MEMORY;
 
-	if (semCount > MAX_POSIX_SEM_VALUE)
+	if (semCount > SEM_VALUE_MAX)
 		return B_BAD_VALUE;
 
 	// userSem must always be given
diff --git a/src/system/libroot/posix/unistd/conf.cpp b/src/system/libroot/posix/unistd/conf.cpp
index e72f470ee2..f13b8b4361 100644
--- a/src/system/libroot/posix/unistd/conf.cpp
+++ b/src/system/libroot/posix/unistd/conf.cpp
@@ -8,6 +8,7 @@
 
 #include <errno.h>
 #include <limits.h>
+#include <semaphore.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -96,7 +97,7 @@ __sysconf(int name)
 			// unlimited, instead of _POSIX_SEM_NSEMS_MAX
 			return -1;
 		case _SC_SEM_VALUE_MAX:
-			return _POSIX_SEM_VALUE_MAX;
+			return SEM_VALUE_MAX;
 		case _SC_IOV_MAX:
 			return IOV_MAX;
 		case _SC_NPROCESSORS_CONF: