Add pthread missing functions in Android

src/Makefile.am

@@ -33,6 +33,8 @@ libiperf_la_SOURCES     = \
                         iperf_util.h \
                         iperf_time.c \
                         iperf_time.h \
+                        iperf_pthread.c \
+                        iperf_pthread.h \
 			dscp.c \
                         net.c \
                         net.h \

src/iperf.h

@@ -74,9 +74,7 @@
 #include <openssl/evp.h>
 #endif // HAVE_SSL
 
-#ifdef HAVE_PTHREAD
-#include <pthread.h>
-#endif // HAVE_PTHREAD
+#include "iperf_pthread.h"
 
 /*
  * Atomic types highly desired, but if not, we approximate what we need

src/iperf_pthread.c

@@ -0,0 +1,40 @@
+#include "iperf_config.h"
+
+#if defined(HAVE_PTHREAD) && defined(__ANDROID__)
+
+/* Workaround for `pthread_cancel()` in Android, using `pthread_kill()` instead,
+ * as Android NDK does not support `pthread_cancel()`.
+ */
+
+#include <signal.h>
+#include "iperf_pthread.h"
+
+int pthread_setcanceltype(int type, int *oldtype) { return 0; }
+int pthread_setcancelstate(int state, int *oldstate) { return 0; }
+int pthread_cancel(pthread_t thread_id) {
+    int status;
+    if ((status = iperf_set_thread_exit_handler()) == 0) {
+        status = pthread_kill(thread_id, SIGUSR1);
+    }
+    return status;
+}
+
+void iperf_thread_exit_handler(int sig)
+{ 
+    pthread_exit(0);
+}
+
+int iperf_set_thread_exit_handler() {
+    int rc;
+    struct sigaction actions;
+
+    memset(&actions, 0, sizeof(actions)); 
+    sigemptyset(&actions.sa_mask);
+    actions.sa_flags = 0; 
+    actions.sa_handler = iperf_thread_exit_handler;
+
+    rc = sigaction(SIGUSR1, &actions, NULL);
+    return rc;
+}
+
+#endif // defined(HAVE_PTHREAD) && defined(__ANDROID__)

src/iperf_pthread.h

@@ -0,0 +1,21 @@
+#include "iperf_config.h"
+
+#if defined(HAVE_PTHREAD)
+
+#include <pthread.h>
+
+#if defined(__ANDROID__)
+
+/* Adding missing `pthread` related definitions in Android.
+ */
+
+#define PTHREAD_CANCEL_ASYNCHRONOUS 0
+#define PTHREAD_CANCEL_ENABLE NULL
+
+int pthread_setcanceltype(int type, int *oldtype);
+int pthread_setcancelstate(int state, int *oldstate);
+int pthread_cancel(pthread_t thread_id);
+
+#endif // defined(__ANDROID__)
+
+#endif // defined(HAVE_PTHREAD)