sched: Implement task local storage

Signed-off-by: Huang Qi <huangqi3@xiaomi.com>

include/nuttx/tls.h

@@ -83,6 +83,20 @@ typedef CODE void (*tls_dtor_t)(FAR void *);
 
 #endif
 
+#if CONFIG_TLS_TASK_NELEM > 0
+#  if CONFIG_TLS_TASK_NELEM > 64
+#    error Too many TLS elements
+#  elif CONFIG_TLS_TASK_NELEM > 32
+     typedef uint64_t tls_task_ndxset_t;
+#  elif CONFIG_TLS_TASK_NELEM > 16
+     typedef uint32_t tls_task_ndxset_t;
+#  elif CONFIG_TLS_TASK_NELEM > 8
+     typedef uint16_t tls_task_ndxset_t;
+#  else
+     typedef uint8_t tls_task_ndxset_t;
+#  endif
+#endif
+
 /* This structure encapsulates all variables associated with getopt(). */
 
 struct getopt_s
@@ -104,6 +118,9 @@ struct task_info_s
 {
   sem_t           ta_sem;
   FAR char      **argv;                         /* Name+start-up parameters     */
+#if CONFIG_TLS_TASK_NELEM > 0
+  uintptr_t       ta_telem[CONFIG_TLS_TASK_NELEM]; /* Task local storage elements */
+#endif
 #if CONFIG_TLS_NELEM > 0
   tls_ndxset_t    ta_tlsset;                    /* Set of TLS indexes allocated */
   tls_dtor_t      ta_tlsdtor[CONFIG_TLS_NELEM]; /* List of TLS destructors      */
@@ -269,6 +286,81 @@ uintptr_t tls_get_value(int tlsindex);
 int tls_set_value(int tlsindex, uintptr_t tlsvalue);
 #endif
 
+#if CONFIG_TLS_TASK_NELEM > 0
+
+/****************************************************************************
+ * Name: task_tls_allocs
+ *
+ * Description:
+ *   Allocate a global-unique task local storage data index
+ *
+ * Input Parameters:
+ *   dtor     - The destructor of task local storage data element
+ *
+ * Returned Value:
+ *   A TLS index that is unique.
+ *
+ ****************************************************************************/
+
+int task_tls_alloc(tls_dtor_t dtor);
+
+/****************************************************************************
+ * Name: task_tls_destruct
+ *
+ * Description:
+ *   Destruct all TLS data element associated with allocated key
+ *
+ * Input Parameters:
+ *    None
+ *
+ * Returned Value:
+ *    None
+ *
+ ****************************************************************************/
+
+void task_tls_destruct(void);
+
+/****************************************************************************
+ * Name: task_tls_set_value
+ *
+ * Description:
+ *   Set the task local storage element associated with the 'tlsindex' to
+ *   'tlsvalue'
+ *
+ * Input Parameters:
+ *   tlsindex - Index of task local storage data element to set
+ *   tlsvalue - The new value of the task local storage data element
+ *
+ * Returned Value:
+ *   Zero is returned on success, a negated errno value is return on
+ *   failure:
+ *
+ *     EINVAL - tlsindex is not in range.
+ *
+ ****************************************************************************/
+
+int task_tls_set_value(int tlsindex, uintptr_t tlsvalue);
+
+/****************************************************************************
+ * Name: task_tls_get_value
+ *
+ * Description:
+ *   Return an the task local storage data value associated with 'tlsindx'
+ *
+ * Input Parameters:
+ *   tlsindex - Index of task local storage data element to return
+ *
+ * Returned Value:
+ *   The value of TLS element associated with 'tlsindex'. Errors are not
+ *   reported.  Zero is returned in the event of an error, but zero may also
+ *   be valid value and returned when there is no error.  The only possible
+ *   error would be if tlsindex < 0 or tlsindex >=CONFIG_TLS_TASK_NELEM.
+ *
+ ****************************************************************************/
+
+uintptr_t task_tls_get_value(int tlsindex);
+#endif
+
 /****************************************************************************
  * Name: tls_get_info
  *
@@ -300,7 +392,7 @@ FAR struct tls_info_s *tls_get_info(void);
  *   None
  *
  * Returned Value:
- *   A set of allocated TLS index
+ *   None
  *
  ****************************************************************************/
 

include/sys/syscall_lookup.h

@@ -105,6 +105,10 @@ SYSCALL_LOOKUP(up_assert,                  2)
   SYSCALL_LOOKUP(task_testcancel,          0)
 #endif
 
+#if CONFIG_TLS_TASK_NELEM > 0
+  SYSCALL_LOOKUP(task_tls_alloc,           1)
+#endif
+
 /* The following can be individually enabled */
 
 #if defined(CONFIG_SCHED_WAITPID) && defined(CONFIG_ARCH_HAVE_VFORK)