From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 js/src/threading/posix/Thread.cpp | 182 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 js/src/threading/posix/Thread.cpp

(limited to 'js/src/threading/posix/Thread.cpp')

diff --git a/js/src/threading/posix/Thread.cpp b/js/src/threading/posix/Thread.cpp
new file mode 100644
index 000000000..2572cc727
--- /dev/null
+++ b/js/src/threading/posix/Thread.cpp
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/Assertions.h"
+
+#include <new>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(__APPLE__) && defined(__MACH__)
+#include <dlfcn.h>
+#endif
+
+#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
+#include <pthread_np.h>
+#endif
+
+#if defined(__linux__)
+#include <sys/prctl.h>
+#endif
+
+#include "threading/Thread.h"
+
+class js::Thread::Id::PlatformData
+{
+  friend class js::Thread;
+  friend js::Thread::Id js::ThisThread::GetId();
+
+  pthread_t ptThread;
+
+  // pthread_t does not have a default initializer, so we have to carry a bool
+  // to tell whether it is safe to compare or not.
+  bool hasThread;
+};
+
+/* static */ js::HashNumber
+js::Thread::Hasher::hash(const Lookup& l)
+{
+  return mozilla::HashBytes(&l.platformData()->ptThread, sizeof(pthread_t));
+}
+
+inline js::Thread::Id::PlatformData*
+js::Thread::Id::platformData()
+{
+  static_assert(sizeof platformData_ >= sizeof(PlatformData),
+                "platformData_ is too small");
+  return reinterpret_cast<PlatformData*>(platformData_);
+}
+
+inline const js::Thread::Id::PlatformData*
+js::Thread::Id::platformData() const
+{
+  static_assert(sizeof platformData_ >= sizeof(PlatformData),
+                "platformData_ is too small");
+  return reinterpret_cast<const PlatformData*>(platformData_);
+}
+
+js::Thread::Id::Id()
+{
+  platformData()->hasThread = false;
+}
+
+bool
+js::Thread::Id::operator==(const Id& aOther) const
+{
+  const PlatformData& self = *platformData();
+  const PlatformData& other = *aOther.platformData();
+  return (!self.hasThread && !other.hasThread) ||
+         (self.hasThread == other.hasThread &&
+          pthread_equal(self.ptThread, other.ptThread));
+}
+
+js::Thread::Thread(Thread&& aOther)
+{
+  id_ = aOther.id_;
+  aOther.id_ = Id();
+}
+
+js::Thread&
+js::Thread::operator=(Thread&& aOther)
+{
+  MOZ_RELEASE_ASSERT(!joinable());
+  id_ = aOther.id_;
+  aOther.id_ = Id();
+  return *this;
+}
+
+bool
+js::Thread::create(void* (*aMain)(void*), void* aArg)
+{
+  pthread_attr_t attrs;
+  int r = pthread_attr_init(&attrs);
+  MOZ_RELEASE_ASSERT(!r);
+  if (options_.stackSize()) {
+    r = pthread_attr_setstacksize(&attrs, options_.stackSize());
+    MOZ_RELEASE_ASSERT(!r);
+  }
+  r = pthread_create(&id_.platformData()->ptThread, &attrs, aMain, aArg);
+  if (r) {
+    // |pthread_create| may leave id_ in an undefined state.
+    id_ = Id();
+    return false;
+  }
+  id_.platformData()->hasThread = true;
+  return true;
+}
+
+void
+js::Thread::join()
+{
+  MOZ_RELEASE_ASSERT(joinable());
+  int r = pthread_join(id_.platformData()->ptThread, nullptr);
+  MOZ_RELEASE_ASSERT(!r);
+  id_ = Id();
+}
+
+void
+js::Thread::detach()
+{
+  MOZ_RELEASE_ASSERT(joinable());
+  int r = pthread_detach(id_.platformData()->ptThread);
+  MOZ_RELEASE_ASSERT(!r);
+  id_ = Id();
+}
+
+js::Thread::Id
+js::ThisThread::GetId()
+{
+  js::Thread::Id id;
+  id.platformData()->ptThread = pthread_self();
+  id.platformData()->hasThread = true;
+  return id;
+}
+
+void
+js::ThisThread::SetName(const char* name)
+{
+  MOZ_RELEASE_ASSERT(name);
+
+#if (defined(__APPLE__) && defined(__MACH__)) || defined(__linux__)
+  // On linux and OS X the name may not be longer than 16 bytes, including
+  // the null terminator. Truncate the name to 15 characters.
+  char nameBuf[16];
+
+  strncpy(nameBuf, name, sizeof nameBuf - 1);
+  nameBuf[sizeof nameBuf - 1] = '\0';
+  name = nameBuf;
+#endif
+
+  int rv;
+#ifdef XP_DARWIN
+  rv = pthread_setname_np(name);
+#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
+  pthread_set_name_np(pthread_self(), name);
+  rv = 0;
+#elif defined(__NetBSD__)
+  rv = pthread_setname_np(pthread_self(), "%s", (void*)name);
+#else
+  rv = pthread_setname_np(pthread_self(), name);
+#endif
+  MOZ_RELEASE_ASSERT(!rv);
+}
+
+void
+js::ThisThread::GetName(char* nameBuffer, size_t len)
+{
+  MOZ_RELEASE_ASSERT(len >= 16);
+
+  int rv = -1;
+#ifdef HAVE_PTHREAD_GETNAME_NP
+  rv = pthread_getname_np(pthread_self(), nameBuffer, len);
+#elif defined(__linux__)
+  rv = prctl(PR_GET_NAME, reinterpret_cast<unsigned long>(nameBuffer));
+#endif
+
+  if (rv)
+    nameBuffer[0] = '\0';
+}
-- 
cgit v1.2.3