xiaoxiang781216 commented on a change in pull request #2518:
URL: https://github.com/apache/incubator-nuttx/pull/2518#discussion_r587980736
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File path: sched/task/task_gettid.c
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@@ -45,5 +50,42 @@
pid_t gettid(void)
{
- return getpid();
+ FAR struct tcb_s *rtcb;
+
+ /* Get the TCB at the head of the ready-to-run task list. That
+ * will usually be the currently executing task. There are two
+ * exceptions to this:
+ *
+ * 1. Early in the start-up sequence, the ready-to-run list may be
+ * empty! In this case, of course, the CPU0 start-up/IDLE thread with
+ * pid == 0 must be running, and
+ * 2. As described above, during certain context-switching conditions the
+ * task at the head of the ready-to-run list may not actually be
+ * running.
+ */
+
+ rtcb = this_task();
+ if (rtcb != NULL)
+ {
+ /* Check if the task is actually running */
+
+ if (rtcb->task_state == TSTATE_TASK_RUNNING)
+ {
+ /* Yes.. Return the task ID from the TCB at the head of the
+ * ready-to-run task list
+ */
+
+ return rtcb->pid;
Review comment:
Ok, I will create a new PR to rename this field.
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