2 files changed, 69 insertions, 5 deletions

diff --git a/src/lib/libc/include/namespace.h b/src/lib/libc/include/namespace.h
index 8503de47be..cc83735b90 100644
--- a/src/lib/libc/include/namespace.h
+++ b/src/lib/libc/include/namespace.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: namespace.h,v 1.16 2023/10/29 14:26:13 millert Exp $  */
+/*      $OpenBSD: namespace.h,v 1.17 2025/10/23 19:06:10 miod Exp $     */
 
 #ifndef _LIBC_NAMESPACE_H_
 #define _LIBC_NAMESPACE_H_
@@ -57,13 +57,13 @@
 #define DEF_WRAP(x)             __weak_alias(x, WRAP(x))
 #define DEF_SYS(x)              __strong_alias(_thread_sys_##x, HIDDEN(x))
 
-#if !defined(__clang__) && __GNUC__ != 3
+#if !defined(__clang__)
 /* our gcc 4.2 handles redirecting builtins via PROTO_NORMAL()'s asm() label */
 #define DEF_BUILTIN(x)          DEF_STRONG(x)
 #define BUILTIN
 #else
 /*
- * clang and gcc can't redirect builtins via asm() labels, so mark
+ * clang can't redirect builtins via asm() labels, so mark
  * them protected instead.
  */
 #define DEF_BUILTIN(x)          __asm("")
@@ -86,7 +86,7 @@ BUILTIN void	*memmove(void *, const void *, __size_t);
 BUILTIN void    *memcpy(void *__restrict, const void *__restrict, __size_t);
 BUILTIN void    *memset(void *, int, __size_t);
 BUILTIN void    __stack_smash_handler(const char [], int __unused);
-#if !defined(__clang__) && __GNUC__ != 3
+#if !defined(__clang__)
 PROTO_NORMAL(memmove);
 PROTO_NORMAL(memcpy);
 PROTO_NORMAL(memset);
diff --git a/src/lib/libc/include/thread_private.h b/src/lib/libc/include/thread_private.h
index 1ec1071161..3e1dbcdf6e 100644
--- a/src/lib/libc/include/thread_private.h
+++ b/src/lib/libc/include/thread_private.h
@@ -1,10 +1,13 @@
-/* $OpenBSD: thread_private.h,v 1.37 2024/08/18 02:25:51 guenther Exp $ */
+/* $OpenBSD: thread_private.h,v 1.40 2025/08/04 01:44:33 dlg Exp $ */
 
 /* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
 
 #ifndef _THREAD_PRIVATE_H_
 #define _THREAD_PRIVATE_H_
 
+#include <sys/types.h>
+#include <sys/gmon.h>
+
 extern int __isthreaded;
 
 #define _MALLOC_MUTEXES 32
@@ -292,6 +295,12 @@ TAILQ_HEAD(pthread_queue, pthread);
 
 #ifdef FUTEX
 
+/*
+ * CAS based implementations
+ */
+
+#define __CMTX_CAS
+
 struct pthread_mutex {
         volatile unsigned int lock;
         int type;
@@ -312,6 +321,10 @@ struct pthread_rwlock {
 
 #else
 
+/*
+ * spinlock based implementations
+ */
+
 struct pthread_mutex {
         _atomic_lock_t lock;
         struct pthread_queue lockers;
@@ -336,6 +349,46 @@ struct pthread_rwlock {
 };
 #endif /* FUTEX */
 
+/* libc mutex */
+
+#define __CMTX_UNLOCKED         0
+#define __CMTX_LOCKED           1
+#define __CMTX_CONTENDED        2
+
+#ifdef __CMTX_CAS
+struct __cmtx {
+        volatile unsigned int   lock;
+};
+
+#define __CMTX_INITIALIZER() {                                          \
+        .lock = __CMTX_UNLOCKED,                                        \
+}
+#else /* __CMTX_CAS */
+struct __cmtx {
+        _atomic_lock_t          spin;
+        volatile unsigned int   lock;
+};
+
+#define __CMTX_INITIALIZER() {                                          \
+        .spin = _SPINLOCK_UNLOCKED,                                     \
+        .lock = __CMTX_UNLOCKED,                                        \
+}
+#endif /* __CMTX_CAS */
+
+/* libc recursive mutex */
+
+struct __rcmtx {
+        volatile pthread_t      owner;
+        struct __cmtx           mtx;
+        unsigned int            depth;
+};
+
+#define __RCMTX_INITIALIZER() {                                         \
+        .owner = NULL,                                                  \
+        .mtx = __CMTX_INITIALIZER(),                                    \
+        .depth = 0,                                                     \
+}
+
 struct pthread_mutex_attr {
         int ma_type;
         int ma_protocol;
@@ -390,6 +443,7 @@ struct pthread {
 
         /* cancel received in a delayed cancel block? */
         int delayed_cancel;
+        struct gmonparam *gmonparam;
 };
 /* flags in pthread->flags */
 #define THREAD_DONE             0x001
@@ -410,6 +464,16 @@ void	_spinlock(volatile _atomic_lock_t *);
 int     _spinlocktry(volatile _atomic_lock_t *);
 void    _spinunlock(volatile _atomic_lock_t *);
 
+void    __cmtx_init(struct __cmtx *);
+int     __cmtx_enter_try(struct __cmtx *);
+void    __cmtx_enter(struct __cmtx *);
+void    __cmtx_leave(struct __cmtx *);
+
+void    __rcmtx_init(struct __rcmtx *);
+int     __rcmtx_enter_try(struct __rcmtx *);
+void    __rcmtx_enter(struct __rcmtx *);
+void    __rcmtx_leave(struct __rcmtx *);
+
 void    _rthread_debug(int, const char *, ...)
                 __attribute__((__format__ (printf, 2, 3)));
 pid_t   _thread_dofork(pid_t (*_sys_fork)(void));