3

03_day/binder_1/Android.bp

@@ -1,5 +1,5 @@
 cc_defaults {
-    name: "my_flags",
+    name: "my_flags_2",
 
     cflags: [
         "-Wall",
@@ -16,11 +16,20 @@ cc_defaults {
 }
 
 cc_binary {
-    name: "my_server_1",
-    defaults: ["my_flags"],
+    name: "my_server_2",
+    defaults: ["my_flags_2"],
     srcs: [
         "my_server.c",
         "binder.c",
     ],
 }
 
+cc_binary {
+    name: "my_client_2",
+    defaults: ["my_flags_2"],
+    srcs: [
+        "my_client.c",
+        "binder.c",
+    ],
+}
+

03_day/binder_1/my_client.c

@@ -0,0 +1,54 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "binder.h"
+
+uint32_t svcmgr_lookup(struct binder_state *bs, uint32_t target, const char *name)
+{
+    uint32_t handle;
+    unsigned iodata[512/4];
+    struct binder_io msg, reply;
+
+    bio_init(&msg, iodata, sizeof(iodata), 4);
+    bio_put_uint32(&msg, 0);  // strict mode header
+    bio_put_string16_x(&msg, SVC_MGR_NAME);
+    bio_put_string16_x(&msg, name);
+
+    if (binder_call(bs, &msg, &reply, target, SVC_MGR_CHECK_SERVICE))
+        return 0;
+
+    handle = bio_get_ref(&reply);
+
+    if (handle)
+        binder_acquire(bs, handle);
+
+    binder_done(bs, &msg, &reply);
+
+    return handle;
+}
+
+int main(int argc, char **argv)
+{
+	struct binder_state *bs;
+	uint32_t svcmgr = BINDER_SERVICE_MANAGER;
+	uint32_t handle;
+    unsigned iodata[512/4];
+    struct binder_io msg, reply;
+
+	bs = binder_open("/dev/binder", 128*1024);
+	if (!bs) {
+		fprintf(stderr, "failed to open binder driver\n");
+		return -1;
+	}
+
+	handle = svcmgr_lookup(bs, svcmgr, argv[argc-1]);
+	fprintf(stderr,"lookup(%s) = %x\n", argv[argc-1], handle);
+
+    bio_init(&msg, iodata, sizeof(iodata), 4);
+
+    binder_call(bs, &msg, &reply, handle, 1);
+	return 0;
+}

03_day/binder_1/my_server.c

@@ -36,6 +36,17 @@ int my_handler(struct binder_state *bs,
                               struct binder_io *reply)
 {
 	printf("my_handler %p %p %p %p\n", bs, txn, msg, reply);
+	switch(txn->code) {
+		case 1:
+			printf("Server : LED_ON, %p\n", (void*)txn->target.ptr);
+			return 0;
+
+		default:
+			printf("unknown code %d\n", txn->code);
+			return -1;
+	}
+
+	bio_put_uint32(reply, 0);
 	return 0;
 }
 
@@ -53,6 +64,7 @@ int main(int argc, char **argv)
 		return -1;
 	}
 
+	printf("Server : &token = %p\n", &token );
 	svcmgr_publish(bs, svcmgr, argv[argc-1], &token);
 	binder_loop(bs, my_handler);
 	return 0;