pthread_cancel.patch

--- a/libpromises/evalfunction.c
+++ b/libpromises/evalfunction.c
@@ -8459,10 +8459,27 @@
     FnCallResult result;
 };
 
+#ifdef __ANDROID__
+#define PTHREAD_CANCELED ((void *)-1)
+static void ThreadSignalHandler(int signum)
+{
+    pthread_exit(PTHREAD_CANCELED);
+}
+#endif
+
 static void *IsReadableThreadRoutine(void *data)
 {
     assert(data != NULL);
 
+#ifdef __ANDROID__
+    struct sigaction actions;
+    memset(&actions, 0, sizeof(actions));
+    sigemptyset(&actions.sa_mask);
+    actions.sa_flags = 0;
+    actions.sa_handler = ThreadSignalHandler;
+    sigaction(SIGUSR2, &actions, NULL);
+#endif
+
     struct IsReadableThreadData *const thread_data = data;
 
     // Give main thread time to call pthread_cond_timedwait(3)
@@ -8614,7 +8631,11 @@
                 "Read operation timed out, exceeded %ld seconds.", path,
                 timeout);
 
+#ifndef __ANDROID__
             ret = pthread_cancel(thread_data.thread);
+#else
+            ret = pthread_kill(thread_data.thread, SIGUSR2);
+#endif
             if (ret != 0)
             {
                 Log(LOG_LEVEL_ERR, "Failed to cancel thread");