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#region Copyright notice and license
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System;
using System.IO;
using System.Threading;
using Grpc.Core.Internal;
namespace Grpc.Core.Profiling
{
internal static class Profilers
{
static readonly NopProfiler DefaultProfiler = new NopProfiler();
static readonly ThreadLocal<IProfiler> profilers = new ThreadLocal<IProfiler>();
public static IProfiler ForCurrentThread()
{
return profilers.Value ?? DefaultProfiler;
}
public static void SetForCurrentThread(IProfiler profiler)
{
profilers.Value = profiler;
}
public static ProfilerScope NewScope(this IProfiler profiler, string tag)
{
return new ProfilerScope(profiler, tag);
}
}
internal class NopProfiler : IProfiler
{
public void Begin(string tag)
{
}
public void End(string tag)
{
}
public void Mark(string tag)
{
}
}
// Profiler using Timespec.PreciseNow
internal class BasicProfiler : IProfiler
{
ProfilerEntry[] entries;
int count;
public BasicProfiler() : this(20*1024*1024)
{
}
public BasicProfiler(int capacity)
{
this.entries = new ProfilerEntry[capacity];
}
public void Begin(string tag)
{
AddEntry(new ProfilerEntry(Timespec.PreciseNow, ProfilerEntry.Type.BEGIN, tag));
}
public void End(string tag)
{
AddEntry(new ProfilerEntry(Timespec.PreciseNow, ProfilerEntry.Type.END, tag));
}
public void Mark(string tag)
{
AddEntry(new ProfilerEntry(Timespec.PreciseNow, ProfilerEntry.Type.MARK, tag));
}
public void Reset()
{
count = 0;
}
public void Dump(string filepath)
{
using (var stream = File.CreateText(filepath))
{
Dump(stream);
}
}
public void Dump(TextWriter stream)
{
for (int i = 0; i < count; i++)
{
var entry = entries[i];
stream.WriteLine(entry.ToString());
}
}
// NOT THREADSAFE!
void AddEntry(ProfilerEntry entry) {
entries[count++] = entry;
}
}
}
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