From 32874d5dcb4867d966f25cd9b2953c9644d97027 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Tue, 23 Jan 2007 02:02:39 +0000
Subject: More work on multi-writer queue (SRMWQueue), proper unit test.

git-svn-id: http://svn.drobilla.net/lad/raul@267 a436a847-0d15-0410-975c-d299462d15a1
---
 tests/queue_test.cpp | 200 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 200 insertions(+)

(limited to 'tests')

diff --git a/tests/queue_test.cpp b/tests/queue_test.cpp
index dc9928d..0b8bbd3 100644
--- a/tests/queue_test.cpp
+++ b/tests/queue_test.cpp
@@ -1,12 +1,210 @@
 #include <iostream>
 #include <string>
+#include <vector>
+#include <algorithm>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <termios.h>
 #include "raul/SRSWQueue.h"
 #include "raul/SRMWQueue.h"
+#include "raul/Thread.h"
+#include "raul/AtomicInt.h"
 
 using namespace std;
 using namespace Raul;
 
+static const unsigned NUM_DATA = 10;
+static const unsigned QUEUE_SIZE = 1024*1024;
+static const unsigned NUM_WRITERS = 2;
+static const unsigned PUSHES_PER_ITERATION = 2;
 
+// Data to read/write using actions pumped through the queue
+struct Record {
+	Record() : read_count(0), write_count(0) {}
+
+	AtomicInt read_count;
+	AtomicInt write_count;
+};
+
+Record data[NUM_DATA];
+
+
+// Actions pumped through the queue to manipulate data
+struct WriteAction {
+	WriteAction(unsigned idx)
+		: index(idx)/*, has_read(false)*/ {}
+
+	inline void read() const {
+		//cout << "READ " << index << "\r\n";
+		//assert(!has_read);
+		++(data[index].read_count);
+		//has_read = true;
+	};
+
+	unsigned index;
+	//bool has_read;
+};
+
+
+// The victim
+SRMWQueue<WriteAction> queue(QUEUE_SIZE); 
+
+
+class WriteThread : public Thread {
+protected:
+	void _run() {
+
+		cout << "Writer starting.\r\n";
+
+		// Wait for everything to get ready
+		sleep(2);
+
+		while (true) {
+			for (unsigned j=0; j < PUSHES_PER_ITERATION; ++j) {
+				unsigned i = rand() % NUM_DATA;
+				if (queue.push(WriteAction(i))) {
+					++(data[i].write_count);
+					//cout << "WRITE " << i << "\r\n";
+				} else {
+					cerr << "FAILED WRITE\r\n";
+				}
+			}
+
+			// FIXME: remove!
+			//if (rand() % 20)
+			//	usleep(1);
+
+			// This thread will never cancel without this here since
+			// all the stuff about is cancellation point free
+			// (good!  RT safe)
+			pthread_testcancel();
+		}
+
+		cout << "Writer exiting." << endl;
+	}
+};
+
+
+// Returns 0 if all read count/write count pairs are equal,
+// otherwise how far off total count was
+unsigned
+data_is_sane()
+{
+	unsigned ret = 0;
+	for (unsigned i=0; i < NUM_DATA; ++i) {
+		unsigned diff = abs(data[i].read_count.get() - data[i].write_count.get());
+		ret += diff;
+	}
+
+	return ret;
+}
+
+
+void
+dump_data()
+{
+	for (unsigned i=0; i < NUM_DATA; ++i) {
+		cout << i << ":\t" << data[i].read_count.get()
+			<< "\t : \t" << data[i].write_count.get();
+		if (data[i].read_count.get() == data[i].write_count.get())
+			cout << "\t OK" << endl;
+		else
+			cout << "\t FAIL" << endl;
+	}
+}
+
+
+
+int main()
+{
+	unsigned long total_processed = 0;
+	
+	vector<WriteThread*> writers(NUM_WRITERS, new WriteThread());
+
+	struct termios orig_term;
+    struct termios raw_term;
+
+    cfmakeraw(&raw_term);
+    if (tcgetattr(0, &orig_term) != 0) return 1; //save terminal settings
+    if (tcsetattr(0, TCSANOW, &raw_term) != 0) return 1; //set to raw
+    fcntl(0, F_SETFL, O_NONBLOCK); //set to nonblocking IO on stdin
+
+
+	for (unsigned i=0; i < NUM_WRITERS; ++i) {
+		writers[i]->set_name(string("Writer ") + (char)('0' + i));
+		writers[i]->start();
+	}
+
+	// Read
+	while (getchar() == -1) {
+		unsigned count = 0;
+		while (count < queue.capacity() && !queue.empty()) {
+			WriteAction action = queue.front();
+			queue.pop();
+			action.read();
+			++count;
+			++total_processed;
+		}
+
+		/*if (count > 0)
+			cout << "Processed " << count << " requests\t\t"
+				<< "(total " << total_processed << ")\r\n";*/
+		
+		//if (total_processed > 0 && total_processed % 128l == 0)
+		//	cout << "Total processed: " << total_processed << "\r\n";
+	}
+
+    if (tcsetattr(0, TCSANOW, &orig_term) != 0) return 1; //restore
+
+	cout << "Finishing." << endl;
+	
+	// Stop the writers
+	for (unsigned i=0; i < NUM_WRITERS; ++i)
+		writers[i]->stop();
+
+	cout << "\n\n****************** DONE *********************\n\n";
+
+	unsigned leftovers = 0;
+
+	// Drain anything left in the queue
+	while (!queue.empty()) {
+		WriteAction action = queue.front();
+		queue.pop();
+		action.read();
+		leftovers++;
+		++total_processed;
+	}
+
+	if (leftovers > 0)
+		cout << "Processed " << leftovers << " leftovers." << endl;
+
+
+	cout << "\n\n*********************************************\n\n";
+
+	cout << "Total processed: " << total_processed << endl;
+	if (total_processed > INT_MAX)
+		cout << "(Counter had to wrap)" << endl;
+	else 
+		cout << "(Counter did NOT have to wrap)" << endl;
+
+
+	unsigned diff = data_is_sane();
+
+	if (diff == 0) {
+		cout << "PASS" << endl;
+	} else {
+		cout << "FAILED BY " << diff << endl;
+	//	dump_data();
+	}
+	
+	dump_data();
+
+	return 0;
+}
+
+
+#if 0
 int main()
 {
 	//SRSWQueue<int> q(10);
@@ -49,3 +247,5 @@ int main()
 	
 	return 0;
 }
+#endif
+
-- 
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