/// <summary>
/// Enables thread exit event for current thread.
/// </summary>
public static void EnableCurrentThreadExitEvent(int callbackId, IntPtr threadLocalValue)
{
Debug.Assert(threadLocalValue != IntPtr.Zero);
// Store any value so that destructor callback is fired.
if (Os.IsWindows)
{
var res = NativeMethodsWindows.FlsSetValue(callbackId, threadLocalValue);
if (!res)
{
throw new InvalidOperationException("FlsSetValue failed: " + Marshal.GetLastWin32Error());
}
}
else if (Os.IsMacOs)
{
var res = NativeMethodsMacOs.pthread_setspecific(callbackId, threadLocalValue);
NativeMethodsLinux.CheckResult(res);
}
else if (Os.IsLinux)
{
var res = Os.IsMono
? NativeMethodsMono.pthread_setspecific(callbackId, threadLocalValue)
: NativeMethodsLinux.pthread_setspecific(callbackId, threadLocalValue);
NativeMethodsLinux.CheckResult(res);
}
else
{
throw new InvalidOperationException("Unsupported OS: " + Environment.OSVersion);
}
}
/// <summary>
/// Removes thread exit callback that has been set with <see cref="SetThreadExitCallback"/>.
/// NOTE: callback may be called as a result of this method call on some platforms.
/// </summary>
/// <param name="callbackId">Callback id returned from <see cref="SetThreadExitCallback"/>.</param>
public static void RemoveThreadExitCallback(int callbackId)
{
if (Os.IsWindows)
{
var res = NativeMethodsWindows.FlsFree(callbackId);
if (!res)
{
throw new InvalidOperationException("FlsFree failed: " + Marshal.GetLastWin32Error());
}
}
else if (Os.IsMacOs)
{
var res = NativeMethodsMacOs.pthread_key_delete(callbackId);
NativeMethodsLinux.CheckResult(res);
}
else if (Os.IsLinux)
{
var res = Os.IsMono
? NativeMethodsMono.pthread_key_delete(callbackId)
: NativeMethodsLinux.pthread_key_delete(callbackId);
NativeMethodsLinux.CheckResult(res);
}
else
{
throw new InvalidOperationException("Unsupported OS: " + Environment.OSVersion);
}
}
/// <summary>
/// Sets the thread exit callback, and returns an id to pass to <see cref="EnableCurrentThreadExitEvent"/>.
/// </summary>
/// <param name="callbackPtr">
/// Pointer to a callback function that matches <see cref="ThreadExitCallback"/>.
/// Get this pointer with <see cref="Marshal.GetFunctionPointerForDelegate"/> method; make sure that passed
/// delegate is not garbage-collected (put it to a static property, for example).
/// </param>
/// <returns>Callback ID.</returns>
public static unsafe int SetThreadExitCallback(IntPtr callbackPtr)
{
if (callbackPtr == IntPtr.Zero)
{
throw new ArgumentException("Should not be Zero", nameof(callbackPtr));
}
if (Os.IsWindows)
{
var res = NativeMethodsWindows.FlsAlloc(callbackPtr);
if (res == NativeMethodsWindows.FLS_OUT_OF_INDEXES)
{
throw new InvalidOperationException("FlsAlloc failed: " + Marshal.GetLastWin32Error());
}
return(res);
}
if (Os.IsMacOs)
{
int tlsIndex;
var res = NativeMethodsMacOs.pthread_key_create(new IntPtr(&tlsIndex), callbackPtr);
NativeMethodsLinux.CheckResult(res);
return(tlsIndex);
}
if (Os.IsLinux)
{
int tlsIndex;
var res = NativeMethodsLinux.pthread_key_create(new IntPtr(&tlsIndex), callbackPtr);
NativeMethodsLinux.CheckResult(res);
return(tlsIndex);
}
throw new InvalidOperationException("Unsupported OS: " + Environment.OSVersion);
}