pthread: reorganized the locations of pthread-related functions and constants

1. According to the POSIX specification, the functions `pthread_kill`
and `pthread_sigmask` have been moved from `pthread.h` to `signal.h`.
2. As required by the POSIX standard, the pthread-related constants
have been relocated from `pthread.h` to `sys/types.h`.

Signed-off-by: guoshichao <guoshichao@xiaomi.com>

include/pthread.h

@@ -774,11 +774,6 @@ int pthread_rwlock_clockwrlock(FAR pthread_rwlock_t *lock,
 int pthread_rwlock_trywrlock(FAR pthread_rwlock_t *lock);
 int pthread_rwlock_unlock(FAR pthread_rwlock_t *lock);
 
-/* Pthread signal management APIs */
-
-int pthread_kill(pthread_t thread, int sig);
-int pthread_sigmask(int how, FAR const sigset_t *set, FAR sigset_t *oset);
-
 #ifdef CONFIG_PTHREAD_SPINLOCKS
 /* Pthread spinlocks */
 
@@ -820,50 +815,11 @@ int pthread_atfork(CODE void (*prepare)(void),
  * available in any inclusion ordering.
  */
 
-#ifndef __PTHREAD_KEY_T_DEFINED
-typedef int pthread_key_t;
-#  define __PTHREAD_KEY_T_DEFINED 1
-#endif
-
 #ifndef __PTHREAD_ADDR_T_DEFINED
 typedef FAR void *pthread_addr_t;
 #  define __PTHREAD_ADDR_T_DEFINED 1
 #endif
 
-#ifndef __PTHREAD_ATTR_T_DEFINED
-struct pthread_attr_s;
-typedef struct pthread_attr_s pthread_attr_t;
-#  define __PTHREAD_ATTR_T_DEFINED 1
-#endif
-
-#ifndef __PTHREAD_T_DEFINED
-typedef pid_t pthread_t;
-#  define __PTHREAD_T_DEFINED 1
-#endif
-
-#ifndef __PTHREAD_CONDATTR_T_DEFINED
-typedef struct pthread_condattr_s pthread_condattr_t;
-#  define __PTHREAD_CONDATTR_T_DEFINED 1
-#endif
-
-#ifndef __PTHREAD_COND_T_DEFINED
-struct pthread_cond_s;
-typedef struct pthread_cond_s pthread_cond_t;
-#  define __PTHREAD_COND_T_DEFINED 1
-#endif
-
-#ifndef __PTHREAD_MUTEXATTR_T_DEFINED
-struct pthread_mutexattr_s;
-typedef struct pthread_mutexattr_s pthread_mutexattr_t;
-#  define __PTHREAD_MUTEXATTR_T_DEFINED 1
-#endif
-
-#ifndef __PTHREAD_MUTEX_T_DEFINED
-struct pthread_mutex_s;
-typedef struct pthread_mutex_s pthread_mutex_t;
-#  define __PTHREAD_MUTEX_T_DEFINED 1
-#endif
-
 #ifndef __PTHREAD_BARRIERATTR_T_DEFINED
 struct pthread_barrierattr_s;
 typedef struct pthread_barrierattr_s pthread_barrierattr_t;
@@ -896,10 +852,4 @@ typedef struct pthread_spinlock_s pthread_spinlock_t;
 #  endif
 #endif /* CONFIG_PTHREAD_SPINLOCKS */
 
-#ifndef __PTHREAD_ONCE_T_DEFINED
-struct pthread_once_s;
-typedef struct pthread_once_s pthread_once_t;
-#  define __PTHREAD_ONCE_T_DEFINED 1
-#endif
-
 #endif /* __INCLUDE_PTHREAD_H */

include/signal.h

@@ -486,6 +486,11 @@ int  sigwaitinfo(FAR const sigset_t *set, FAR struct siginfo *value);
 int  sigaltstack(FAR const stack_t *ss, FAR stack_t *oss);
 int  siginterrupt(int signo, int flag);
 
+/* Pthread signal management APIs */
+
+int pthread_kill(pthread_t thread, int sig);
+int pthread_sigmask(int how, FAR const sigset_t *set, FAR sigset_t *oset);
+
 #undef EXTERN
 #ifdef __cplusplus
 }

include/sys/types.h

@@ -323,6 +323,51 @@ enum
   OK = 0
 };
 
+#ifndef __PTHREAD_ATTR_T_DEFINED
+struct pthread_attr_s;
+typedef struct pthread_attr_s pthread_attr_t;
+#  define __PTHREAD_ATTR_T_DEFINED 1
+#endif
+
+#ifndef __PTHREAD_COND_T_DEFINED
+struct pthread_cond_s;
+typedef struct pthread_cond_s pthread_cond_t;
+#  define __PTHREAD_COND_T_DEFINED 1
+#endif
+
+#ifndef __PTHREAD_CONDATTR_T_DEFINED
+typedef struct pthread_condattr_s pthread_condattr_t;
+#  define __PTHREAD_CONDATTR_T_DEFINED 1
+#endif
+
+#ifndef __PTHREAD_KEY_T_DEFINED
+typedef int pthread_key_t;
+#  define __PTHREAD_KEY_T_DEFINED 1
+#endif
+
+#ifndef __PTHREAD_MUTEX_T_DEFINED
+struct pthread_mutex_s;
+typedef struct pthread_mutex_s pthread_mutex_t;
+#  define __PTHREAD_MUTEX_T_DEFINED 1
+#endif
+
+#ifndef __PTHREAD_MUTEXATTR_T_DEFINED
+struct pthread_mutexattr_s;
+typedef struct pthread_mutexattr_s pthread_mutexattr_t;
+#  define __PTHREAD_MUTEXATTR_T_DEFINED 1
+#endif
+
+#ifndef __PTHREAD_T_DEFINED
+typedef pid_t pthread_t;
+#  define __PTHREAD_T_DEFINED 1
+#endif
+
+#ifndef __PTHREAD_ONCE_T_DEFINED
+struct pthread_once_s;
+typedef struct pthread_once_s pthread_once_t;
+#  define __PTHREAD_ONCE_T_DEFINED 1
+#endif
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/