taskvine: add example for building and testing C api

.github/workflows/daily.yml

@@ -78,6 +78,15 @@ jobs:
         - name: Test Vine Serverless Mode
           run:  ./test-vine-serverless.sh
 
+  vine-throughput-capi-job:
+     runs-on: ubuntu-20.04
+     timeout-minutes: 20
+     steps:
+        - name: Checkout
+          uses: actions/checkout@v3
+        - name: Test Vine Throughput Test C API
+          run:  ./test-vine-task-throughput-capi.sh
+
   parrot-cvmfs-job:
     runs-on: ubuntu-20.04
     timeout-minutes: 10

test-vine-task-throughput-capi.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# Build the sources from github
+. ./install-github.sh
+
+# Compile C API test using environment 
+gcc test-vine-task-throughput.c -o test-vine-task-throughput -I $PREFIX/include/cctools/ -L $PREFIX/lib -ltaskvine -ldttools -lm -lcrypto -lssl -lz
+
+./test-vine-task-throughput &
+
+vine_worker localhost 9123 --single-shot

test-vine-task-throughput.c

@@ -0,0 +1,50 @@
+#include "taskvine.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <time.h>
+
+int main(int argc, char *argv[])
+{
+	struct vine_manager *m;
+	struct vine_task *t;
+	int i;
+    int tasksC = 5000;
+
+	//Create the manager. All tasks and files will be declared with respect to
+	m = vine_create(9123);
+	if(!m) {
+		printf("couldn't create manager: %s\n", strerror(errno));
+		return 1;
+	}
+	printf("TaskVine listening on %d\n", vine_port(m));
+	printf("Declaring tasks...");
+
+	for(i=0;i<tasksC;i++) {
+		struct vine_task *t = vine_task_create(":");
+		vine_task_set_cores(t, 1);
+		int task_id = vine_submit(m, t);
+	}
+
+	printf("waiting for tasks to complete...\n");
+	clock_t start = clock();
+	while(!vine_empty(m)) {
+		t  = vine_wait(m, 5);
+		if(t) {
+			vine_task_delete(t);
+		}
+	}
+	clock_t end = clock();
+	double time = ((double)(end - start)) / CLOCKS_PER_SEC;
+	double throughput = tasksC / time;
+	printf("all tasks complete!\n");
+	printf("Time was %f seconds\n", time);
+	printf("Throughput was %f tasks per second\n", throughput);
+	//Free the manager structure, and release all the workers.
+	vine_delete(m);
+
+	return 0;
+}