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-rw-r--r--c-user/task/directives.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/c-user/task/directives.rst b/c-user/task/directives.rst
index 9004407..47e51d1 100644
--- a/c-user/task/directives.rst
+++ b/c-user/task/directives.rst
@@ -802,6 +802,9 @@ specified by ``id``.
:c:macro:`RTEMS_INVALID_ID`
There was no task associated with the identifier specified by ``id``.
+:c:macro:`RTEMS_CALLED_FROM_ISR`
+ The directive was called from within interrupt context.
+
:c:macro:`RTEMS_ILLEGAL_ON_REMOTE_OBJECT`
The task resided on a remote node.