From 707f6cfecb39bac6f88ec77cf6854cfc0624dd49 Mon Sep 17 00:00:00 2001
From: Nikhil Samith Bysani <nbysani2@illinois.edu>
Date: Mon, 12 Jan 2009 13:32:14 -0500
Subject: [PATCH] Wrote some stub functions in the module-api.

---
 src/base/bang-module-api.c | 19 ++++++++++++++++-
 src/base/bang-module-api.h |  4 ++--
 src/base/bang-module.c     | 43 +++++++++++++++++++++++++++-----------
 3 files changed, 51 insertions(+), 15 deletions(-)

diff --git a/src/base/bang-module-api.c b/src/base/bang-module-api.c
index 320f1c0..eb77b4b 100644
--- a/src/base/bang-module-api.c
+++ b/src/base/bang-module-api.c
@@ -9,7 +9,7 @@
 #include<stdio.h>
 #include"bang-module-api.h"
 
-///TODO: Implement this.  Well, this is basically what are our app is all about.
+/* TODO: Implement this.  Well, this is basically what are our app is all about. */
 void BANG_debug_on_all_peers(char *message) {
 	fprintf(stderr,message);
 }
@@ -24,3 +24,20 @@ int BANG_number_of_active_peers() {
 int BANG_get_my_id() {
 	return -1;
 }
+
+void BANG_assert_authority(int id) {
+	fprintf(stderr,"%d is asserting authority!\n",id);
+}
+
+BANG_job* BANG_request_job(int id, char blocking) {
+	fprintf(stderr,"Requesting a job from authority %d with blocking at %d!\n",id,blocking);
+	return NULL;
+}
+
+void BANG_finished_request(BANG_job job) {
+	fprintf(stderr,"Finished job for authority %d!\n",job.authority);
+}
+
+void BANG_send_job(int id, BANG_job job) {
+	fprintf(stderr,"Sending job to %d by authority %d!\n",id,job.authority);
+}
diff --git a/src/base/bang-module-api.h b/src/base/bang-module-api.h
index 8d156d2..706d364 100644
--- a/src/base/bang-module-api.h
+++ b/src/base/bang-module-api.h
@@ -81,7 +81,7 @@ BANG_job* BANG_request_job(int id, char blocking);
  * \brief Sends the job to the peer.  If the peer is you,
  * it will send it to your callback method.
  */
-int BANG_finished_request(BANG_job job);
+void BANG_finished_request(BANG_job job);
 
 /**
  * \param The peer to send your the job to.
@@ -103,7 +103,7 @@ typedef struct {
 	int (*BANG_get_my_id) ();
 	void (*BANG_assert_authority) (int id);
 	BANG_job* (*BANG_request_job) (int id, char blocking);
-	int (*BANG_finished_request) (BANG_job job);
+	void (*BANG_finished_request) (BANG_job job);
 	void (*BANG_send_job) (int id, BANG_job job);
 } BANG_api;
 #endif
diff --git a/src/base/bang-module.c b/src/base/bang-module.c
index 0e64ace..cbd60ce 100644
--- a/src/base/bang-module.c
+++ b/src/base/bang-module.c
@@ -41,10 +41,7 @@ static unsigned char* module_hash(char *path) {
 	int read = UPDATE_SIZE;
 
 	unsigned char *md = (unsigned char*) calloc(SHA_DIGEST_LENGTH,sizeof(unsigned char));
-	/*
-	 * This ctx creation should be done in an init
-	 * function as it takes some time.
-	 */
+
 	static EVP_MD_CTX *ctx = NULL; 
 	ctx = (ctx == NULL)  ? EVP_MD_CTX_create() : ctx;
 
@@ -68,6 +65,35 @@ static unsigned char* module_hash(char *path) {
 	return md;
 }
 
+/**
+ * \return An api.
+ */
+static BANG_api get_BANG_api() {
+	static int completed = 0;
+
+	static BANG_api api;
+
+	if (!completed) {
+		/*If we forget to do something in this function, this will force
+		 * the program to segfault when a module calls a function
+		 * we were susposed to give them. */
+		memset(&api,0,sizeof(BANG_api));
+
+		api.BANG_debug_on_all_peers = &BANG_debug_on_all_peers;
+		api.BANG_get_me_peers = &BANG_get_me_peers;
+		api.BANG_number_of_active_peers = &BANG_number_of_active_peers;
+		api.BANG_get_my_id = &BANG_get_my_id;
+		api.BANG_assert_authority = &BANG_assert_authority;
+		api.BANG_request_job = &BANG_request_job;
+		api.BANG_finished_request = &BANG_finished_request;
+		api.BANG_send_job = &BANG_send_job;
+	}
+
+	completed = 1;
+
+	return api;
+}
+
 BANG_module* BANG_load_module(char *path) {
 	/* Get rid of any lingering errors. */
 	/* while (dlerror() != NULL) {} 
@@ -161,14 +187,7 @@ BANG_module* BANG_load_module(char *path) {
 	module->handle = handle;
 	module->path = path;
 
-	BANG_api api;
-	memset(&api,0,sizeof(BANG_api));
-	api.BANG_debug_on_all_peers = &BANG_debug_on_all_peers;
-	api.BANG_get_me_peers = &BANG_get_me_peers;
-	api.BANG_number_of_active_peers = &BANG_number_of_active_peers;
-	api.BANG_get_my_id = &BANG_get_my_id;
-
-	module->module_init(api);
+	module->module_init(get_BANG_api());
 
 	return module;
 }