Vendor bundled gems for deployment

1 files changed, 354 insertions, 0 deletions

diff --git a/vendor/bundle/ruby/3.4.0/gems/eventmachine-1.2.7/ext/pipe.cpp b/vendor/bundle/ruby/3.4.0/gems/eventmachine-1.2.7/ext/pipe.cpp
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+/*****************************************************************************
+
+$Id$
+
+File:     pipe.cpp
+Date:     30May07
+
+Copyright (C) 2006-07 by Francis Cianfrocca. All Rights Reserved.
+Gmail: blackhedd
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of either: 1) the GNU General Public License
+as published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version; or 2) Ruby's License.
+
+See the file COPYING for complete licensing information.
+
+*****************************************************************************/
+
+#include "project.h"
+
+
+#ifdef OS_UNIX
+// THIS ENTIRE FILE IS ONLY COMPILED ON UNIX-LIKE SYSTEMS.
+
+/******************************
+PipeDescriptor::PipeDescriptor
+******************************/
+
+PipeDescriptor::PipeDescriptor (int fd, pid_t subpid, EventMachine_t *parent_em):
+	EventableDescriptor (fd, parent_em),
+	bReadAttemptedAfterClose (false),
+	OutboundDataSize (0),
+	SubprocessPid (subpid)
+{
+	#ifdef HAVE_EPOLL
+	EpollEvent.events = EPOLLIN;
+	#endif
+	#ifdef HAVE_KQUEUE
+	MyEventMachine->ArmKqueueReader (this);
+	#endif
+}
+
+
+/*******************************
+PipeDescriptor::~PipeDescriptor
+*******************************/
+
+PipeDescriptor::~PipeDescriptor() NO_EXCEPT_FALSE
+{
+	// Run down any stranded outbound data.
+	for (size_t i=0; i < OutboundPages.size(); i++)
+		OutboundPages[i].Free();
+
+	/* As a virtual destructor, we come here before the base-class
+	 * destructor that closes our file-descriptor.
+	 * We have to make sure the subprocess goes down (if it's not
+	 * already down) and we have to reap the zombie.
+	 *
+	 * This implementation is PROVISIONAL and will surely be improved.
+	 * The intention here is that we never block, hence the highly
+	 * undesirable sleeps. But if we can't reap the subprocess even
+	 * after sending it SIGKILL, then something is wrong and we
+	 * throw a fatal exception, which is also not something we should
+	 * be doing.
+	 *
+	 * Eventually the right thing to do will be to have the reactor
+	 * core respond to SIGCHLD by chaining a handler on top of the
+	 * one Ruby may have installed, and dealing with a list of dead
+	 * children that are pending cleanup.
+	 *
+	 * Since we want to have a signal processor integrated into the
+	 * client-visible API, let's wait until that is done before cleaning
+	 * this up.
+	 *
+	 * Added a very ugly hack to support passing the subprocess's exit
+	 * status to the user. It only makes logical sense for user code to access
+	 * the subprocess exit status in the unbind callback. But unbind is called
+	 * back during the EventableDescriptor destructor. So by that time there's
+	 * no way to call back this object through an object binding, because it's
+	 * already been cleaned up. We might have added a parameter to the unbind
+	 * callback, but that would probably break a huge amount of existing code.
+	 * So the hack-solution is to define an instance variable in the EventMachine
+	 * object and stick the exit status in there, where it can easily be accessed
+	 * with an accessor visible to user code.
+	 * User code should ONLY access the exit status from within the unbind callback.
+	 * Otherwise there's no guarantee it'll be valid.
+	 * This hack won't make it impossible to run multiple EventMachines in a single
+	 * process, but it will make it impossible to reliably nest unbind calls
+	 * within other unbind calls. (Not sure if that's even possible.)
+	 */
+
+	assert (MyEventMachine);
+
+	/* Another hack to make the SubprocessPid available to get_subprocess_status */
+	MyEventMachine->SubprocessPid = SubprocessPid;
+
+	/* 01Mar09: Updated to use a small nanosleep in a loop. When nanosleep is interrupted by SIGCHLD,
+	 * it resumes the system call after processing the signal (resulting in unnecessary latency).
+	 * Calling nanosleep in a loop avoids this problem.
+	 */
+	struct timespec req = {0, 50000000}; // 0.05s
+	int n;
+
+	// wait 0.5s for the process to die
+	for (n=0; n<10; n++) {
+		if (waitpid (SubprocessPid, &(MyEventMachine->SubprocessExitStatus), WNOHANG) != 0) return;
+		nanosleep (&req, NULL);
+	}
+
+	// send SIGTERM and wait another 1s
+	kill (SubprocessPid, SIGTERM);
+	for (n=0; n<20; n++) {
+		nanosleep (&req, NULL);
+		if (waitpid (SubprocessPid, &(MyEventMachine->SubprocessExitStatus), WNOHANG) != 0) return;
+	}
+
+	// send SIGKILL and wait another 5s
+	kill (SubprocessPid, SIGKILL);
+	for (n=0; n<100; n++) {
+		nanosleep (&req, NULL);
+		if (waitpid (SubprocessPid, &(MyEventMachine->SubprocessExitStatus), WNOHANG) != 0) return;
+	}
+
+	// still not dead, give up!
+	throw std::runtime_error ("unable to reap subprocess");
+}
+
+
+
+/********************
+PipeDescriptor::Read
+********************/
+
+void PipeDescriptor::Read()
+{
+	int sd = GetSocket();
+	if (sd == INVALID_SOCKET) {
+		assert (!bReadAttemptedAfterClose);
+		bReadAttemptedAfterClose = true;
+		return;
+	}
+
+	LastActivity = MyEventMachine->GetCurrentLoopTime();
+
+	int total_bytes_read = 0;
+	char readbuffer [16 * 1024];
+
+	for (int i=0; i < 10; i++) {
+		// Don't read just one buffer and then move on. This is faster
+		// if there is a lot of incoming.
+		// But don't read indefinitely. Give other sockets a chance to run.
+		// NOTICE, we're reading one less than the buffer size.
+		// That's so we can put a guard byte at the end of what we send
+		// to user code.
+		// Use read instead of recv, which on Linux gives a "socket operation
+		// on nonsocket" error.
+		
+
+		int r = read (sd, readbuffer, sizeof(readbuffer) - 1);
+		//cerr << "<R:" << r << ">";
+
+		if (r > 0) {
+			total_bytes_read += r;
+
+			// Add a null-terminator at the the end of the buffer
+			// that we will send to the callback.
+			// DO NOT EVER CHANGE THIS. We want to explicitly allow users
+			// to be able to depend on this behavior, so they will have
+			// the option to do some things faster. Additionally it's
+			// a security guard against buffer overflows.
+			readbuffer [r] = 0;
+			_GenericInboundDispatch(readbuffer, r);
+			}
+		else if (r == 0) {
+			break;
+		}
+		else {
+			// Basically a would-block, meaning we've read everything there is to read.
+			break;
+		}
+
+	}
+
+
+	if (total_bytes_read == 0) {
+		// If we read no data on a socket that selected readable,
+		// it generally means the other end closed the connection gracefully.
+		ScheduleClose (false);
+		//bCloseNow = true;
+	}
+
+}
+
+/*********************
+PipeDescriptor::Write
+*********************/
+
+void PipeDescriptor::Write()
+{
+	int sd = GetSocket();
+	assert (sd != INVALID_SOCKET);
+
+	LastActivity = MyEventMachine->GetCurrentLoopTime();
+	char output_buffer [16 * 1024];
+	size_t nbytes = 0;
+
+	while ((OutboundPages.size() > 0) && (nbytes < sizeof(output_buffer))) {
+		OutboundPage *op = &(OutboundPages[0]);
+		if ((nbytes + op->Length - op->Offset) < sizeof (output_buffer)) {
+			memcpy (output_buffer + nbytes, op->Buffer + op->Offset, op->Length - op->Offset);
+			nbytes += (op->Length - op->Offset);
+			op->Free();
+			OutboundPages.pop_front();
+		}
+		else {
+			int len = sizeof(output_buffer) - nbytes;
+			memcpy (output_buffer + nbytes, op->Buffer + op->Offset, len);
+			op->Offset += len;
+			nbytes += len;
+		}
+	}
+
+	// We should never have gotten here if there were no data to write,
+	// so assert that as a sanity check.
+	// Don't bother to make sure nbytes is less than output_buffer because
+	// if it were we probably would have crashed already.
+	assert (nbytes > 0);
+
+	assert (GetSocket() != INVALID_SOCKET);
+	int bytes_written = write (GetSocket(), output_buffer, nbytes);
+#ifdef OS_WIN32
+	int e = WSAGetLastError();
+#else
+	int e = errno;
+#endif
+
+	if (bytes_written > 0) {
+		OutboundDataSize -= bytes_written;
+		if ((size_t)bytes_written < nbytes) {
+			int len = nbytes - bytes_written;
+			char *buffer = (char*) malloc (len + 1);
+			if (!buffer)
+				throw std::runtime_error ("bad alloc throwing back data");
+			memcpy (buffer, output_buffer + bytes_written, len);
+			buffer [len] = 0;
+			OutboundPages.push_front (OutboundPage (buffer, len));
+		}
+		#ifdef HAVE_EPOLL
+		EpollEvent.events = EPOLLIN;
+		if (SelectForWrite())
+			EpollEvent.events |= EPOLLOUT;
+		assert (MyEventMachine);
+		MyEventMachine->Modify (this);
+		#endif
+	}
+	else {
+		#ifdef OS_UNIX
+		if ((e != EINPROGRESS) && (e != EWOULDBLOCK) && (e != EINTR))
+		#endif
+		#ifdef OS_WIN32
+		if ((e != WSAEINPROGRESS) && (e != WSAEWOULDBLOCK))
+		#endif
+			Close();
+	}
+}
+
+
+/*************************
+PipeDescriptor::Heartbeat
+*************************/
+
+void PipeDescriptor::Heartbeat()
+{
+	// If an inactivity timeout is defined, then check for it.
+	if (InactivityTimeout && ((MyEventMachine->GetCurrentLoopTime() - LastActivity) >= InactivityTimeout))
+		ScheduleClose (false);
+		//bCloseNow = true;
+}
+
+
+/*****************************
+PipeDescriptor::SelectForRead
+*****************************/
+
+bool PipeDescriptor::SelectForRead()
+{
+	/* Pipe descriptors, being local by definition, don't have
+	 * a pending state, so this is simpler than for the
+	 * ConnectionDescriptor object.
+	 */
+	return bPaused ? false : true;
+}
+
+/******************************
+PipeDescriptor::SelectForWrite
+******************************/
+
+bool PipeDescriptor::SelectForWrite()
+{
+	/* Pipe descriptors, being local by definition, don't have
+	 * a pending state, so this is simpler than for the
+	 * ConnectionDescriptor object.
+	 */
+	return (GetOutboundDataSize() > 0) && !bPaused ? true : false;
+}
+
+
+
+
+/********************************
+PipeDescriptor::SendOutboundData
+********************************/
+
+int PipeDescriptor::SendOutboundData (const char *data, unsigned long length)
+{
+	//if (bCloseNow || bCloseAfterWriting)
+	if (IsCloseScheduled())
+		return 0;
+
+	if (!data && (length > 0))
+		throw std::runtime_error ("bad outbound data");
+	char *buffer = (char *) malloc (length + 1);
+	if (!buffer)
+		throw std::runtime_error ("no allocation for outbound data");
+	memcpy (buffer, data, length);
+	buffer [length] = 0;
+	OutboundPages.push_back (OutboundPage (buffer, length));
+	OutboundDataSize += length;
+	#ifdef HAVE_EPOLL
+	EpollEvent.events = (EPOLLIN | EPOLLOUT);
+	assert (MyEventMachine);
+	MyEventMachine->Modify (this);
+	#endif
+	return length;
+}
+
+/********************************
+PipeDescriptor::GetSubprocessPid
+********************************/
+
+bool PipeDescriptor::GetSubprocessPid (pid_t *pid)
+{
+	bool ok = false;
+	if (pid && (SubprocessPid > 0)) {
+		*pid = SubprocessPid;
+		ok = true;
+	}
+	return ok;
+}
+
+
+#endif // OS_UNIX
+