pthread: add pthread_self/pthread_gettid_np function

explicitly defined functions can support assignment as function pointers

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

include/pthread.h

@@ -563,8 +563,8 @@ void pthread_yield(void);
 
 /* A thread may obtain a copy of its own thread handle. */
 
-#define pthread_self()            ((pthread_t)gettid())
-#define pthread_gettid_np(thread) ((pid_t)(thread))
+pthread_t pthread_self(void);
+pid_t pthread_gettid_np(pthread_t thread);
 
 /* Compare two thread IDs. */
 

libs/libc/libc.csv

@@ -214,6 +214,7 @@
 "pthread_create","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_t *","FAR const pthread_attr_t *","pthread_startroutine_t","pthread_addr_t"
 "pthread_getname_np","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","pthread_t","char *","size_t"
 "pthread_getspecific","pthread.h","!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0","FAR void *","pthread_key_t"
+"pthread_gettid_np","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","pid_t","pthread_t"
 "pthread_key_create","pthread.h","!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0","int","FAR pthread_key_t *","FAR void (*) (void *)|FAR void *"
 "pthread_key_delete","pthread.h","!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0","int","pthread_key_t"
 "pthread_mutex_lock","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_mutex_t *"
@@ -228,6 +229,7 @@
 "pthread_rwlock_init","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_rwlock_t *restrict","FAR const pthread_rwlockattr_t *"
 "pthread_rwlock_rdlock","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_rwlock_t *"
 "pthread_rwlock_unlock","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_rwlock_t *"
+"pthread_self","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","pthread_t","void"
 "pthread_setname_np","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","pthread_t","const char *"
 "pthread_setspecific","pthread.h","!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0","int","pthread_key_t","FAR const void *"
 "pthread_yield","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","void"

libs/libc/pthread/CMakeLists.txt

@@ -93,7 +93,9 @@ if(NOT CONFIG_DISABLE_PTHREAD)
     pthread_setcancelstate.c
     pthread_setcanceltype.c
     pthread_testcancel.c
-    pthread_getcpuclockid.c)
+    pthread_getcpuclockid.c
+    pthread_self.c
+    pthread_gettid_np.c)
 
   if(CONFIG_SMP)
     list(APPEND SRCS pthread_attr_getaffinity.c pthread_attr_setaffinity.c)

libs/libc/pthread/Make.defs

@@ -58,6 +58,7 @@ CSRCS += pthread_rwlockattr_getpshared.c pthread_rwlockattr_setpshared.c
 CSRCS += pthread_rwlock.c pthread_rwlock_rdlock.c pthread_rwlock_wrlock.c
 CSRCS += pthread_setcancelstate.c pthread_setcanceltype.c
 CSRCS += pthread_testcancel.c pthread_getcpuclockid.c
+CSRCS += pthread_self.c pthread_gettid_np.c
 
 ifeq ($(CONFIG_SMP),y)
 CSRCS += pthread_attr_getaffinity.c pthread_attr_setaffinity.c

libs/libc/pthread/pthread_gettid_np.c

@@ -0,0 +1,48 @@
+/****************************************************************************
+ * libs/libc/pthread/pthread_gettid_np.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <pthread.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: pthread_gettid_np
+ *
+ * Description:
+ *   Return the thread ID of the specified thread.
+ *
+ * Input Parameters:
+ *   thread - The thread for which to return the thread ID
+ *
+ * Returned Value:
+ *   The ID of the thread.
+ *
+ ****************************************************************************/
+
+pid_t pthread_gettid_np(pthread_t thread)
+{
+  return (pid_t)thread;
+}

libs/libc/pthread/pthread_self.c

@@ -0,0 +1,48 @@
+/****************************************************************************
+ * libs/libc/pthread/pthread_self.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <pthread.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: pthread_self
+ *
+ * Description:
+ *   Return the thread ID of the calling thread.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   ID of the calling thread.
+ *
+ ****************************************************************************/
+
+pthread_t pthread_self(void)
+{
+  return (pthread_t)gettid();
+}