Better F6 profiler (#8750)

Update the profiler names to make more sense of what they actually represent
Move the profiler code from header to its source file
Use monospace font to align lines
Format the statistics line to align better with surrounding values
Refresh the profiler each 3 seconds (roughly)

src/profiler.cpp

@@ -18,6 +18,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #include "profiler.h"
+#include "porting.h"
 
 static Profiler main_profiler;
 Profiler *g_profiler = &main_profiler;
@@ -26,8 +27,9 @@ ScopeProfiler::ScopeProfiler(
 		m_profiler(profiler),
 		m_name(name), m_type(type)
 {
+	m_name.append(" [ms]");
 	if (m_profiler)
-		m_timer = new TimeTaker(m_name);
+		m_timer = new TimeTaker(m_name, nullptr, PRECISION_MILLI);
 }
 
 ScopeProfiler::~ScopeProfiler()
@@ -52,3 +54,129 @@ ScopeProfiler::~ScopeProfiler()
 	}
 	delete m_timer;
 }
+
+Profiler::Profiler()
+{
+	m_start_time = porting::getTimeMs();
+}
+
+void Profiler::add(const std::string &name, float value)
+{
+	MutexAutoLock lock(m_mutex);
+	{
+		/* No average shall have been used; mark add used as -2 */
+		std::map<std::string, int>::iterator n = m_avgcounts.find(name);
+		if (n == m_avgcounts.end()) {
+			m_avgcounts[name] = -2;
+		} else {
+			if (n->second == -1)
+				n->second = -2;
+			assert(n->second == -2);
+		}
+	}
+	{
+		std::map<std::string, float>::iterator n = m_data.find(name);
+		if (n == m_data.end())
+			m_data[name] = value;
+		else
+			n->second += value;
+	}
+}
+
+void Profiler::avg(const std::string &name, float value)
+{
+	MutexAutoLock lock(m_mutex);
+	int &count = m_avgcounts[name];
+
+	assert(count != -2);
+	count = MYMAX(count, 0) + 1;
+	m_data[name] += value;
+}
+
+void Profiler::clear()
+{
+	MutexAutoLock lock(m_mutex);
+	for (auto &it : m_data) {
+		it.second = 0;
+	}
+	m_avgcounts.clear();
+	m_start_time = porting::getTimeMs();
+}
+
+float Profiler::getValue(const std::string &name) const
+{
+	auto numerator = m_data.find(name);
+	if (numerator == m_data.end())
+		return 0.f;
+
+	auto denominator = m_avgcounts.find(name);
+	if (denominator != m_avgcounts.end()) {
+		if (denominator->second >= 1)
+			return numerator->second / denominator->second;
+	}
+
+	return numerator->second;
+}
+
+int Profiler::getAvgCount(const std::string &name) const
+{
+	auto n = m_avgcounts.find(name);
+
+	if (n != m_avgcounts.end() && n->second >= 1)
+		return n->second;
+
+	return 1;
+}
+
+u64 Profiler::getElapsedMs() const
+{
+	return porting::getTimeMs() - m_start_time;
+}
+
+int Profiler::print(std::ostream &o, u32 page, u32 pagecount)
+{
+	GraphValues values;
+	getPage(values, page, pagecount);
+	char num_buf[50];
+
+	for (const auto &i : values) {
+		o << "  " << i.first << " ";
+		if (i.second == 0) {
+			o << std::endl;
+			continue;
+		}
+
+		s32 space = 44 - i.first.size();
+		for (s32 j = 0; j < space; j++) {
+			if ((j & 1) && j < space - 1)
+				o << ".";
+			else
+				o << " ";
+		}
+		porting::mt_snprintf(num_buf, sizeof(num_buf), "% 4ix % 3g",
+				getAvgCount(i.first), i.second);
+		o << num_buf << std::endl;
+	}
+	return values.size();
+}
+
+void Profiler::getPage(GraphValues &o, u32 page, u32 pagecount)
+{
+	MutexAutoLock lock(m_mutex);
+
+	u32 minindex, maxindex;
+	paging(m_data.size(), page, pagecount, minindex, maxindex);
+
+	for (const auto &i : m_data) {
+		if (maxindex == 0)
+			break;
+		maxindex--;
+
+		if (minindex != 0) {
+			minindex--;
+			continue;
+		}
+
+		o[i.first] = i.second / getAvgCount(i.first);
+	}
+}