diff options
authorSaya Sugiura <>2020-12-21 11:40:42 +0900
committerSaya Sugiura <>2021-01-06 09:19:55 +0900
commit1987fa2b75253d9f47cde8f4dd593509027147a5 (patch)
parent21c109d2f98a7f6752f0791b5780fba795d84132 (diff)
doc: Limitation to SIGUSR1 usage on Androiddevel_v2.18.5_local_changes
Signed-off-by: Saya Sugiura <>
2 files changed, 12 insertions, 0 deletions
diff --git a/doc/ b/doc/
index a6df3c5..b5f8cc7 100644
--- a/doc/
+++ b/doc/
@@ -350,6 +350,13 @@ steps are executed:
- Store service id in callback table
- Store function pointer in callback table
+#### Android: Thread termination
+On Android, `pthread_cancel` is not available in bionic. So current
+implementation uses *SIGUSR1* and `pthread_kill` to terminate housekeeper
+thread. Due to this, application which is linked to DLT library should not
+define *SIGUSR1*.
### Communication between DLT daemon and DLT user library
The communication mechanism (IPC) used between DLT daemon and DLT user library
diff --git a/doc/ b/doc/
index 931397c..781f6fb 100644
--- a/doc/
+++ b/doc/
@@ -81,6 +81,11 @@ and to TARGET\_LINK\_LIBRARIES:
+### Limitation
+On Android, definition of `SIGUSR1` in DLT application shall be avoided since
+DLT library blocks `SIGUSR1` to terminate housekeeper thread at exit.
## General Rules for Logging
### Be Smart