Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/webrtc/system_wrappers/source/cpu_info.cc

@@ -0,0 +1,64 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/system_wrappers/interface/cpu_info.h"
+
+#if defined(_WIN32)
+#include <Windows.h>
+#elif defined(WEBRTC_MAC)
+#include <sys/sysctl.h>
+#include <sys/types.h>
+#else // defined(WEBRTC_LINUX) or defined(WEBRTC_ANDROID)
+#include <unistd.h>
+#endif
+
+#include "webrtc/system_wrappers/interface/trace.h"
+
+namespace webrtc {
+
+uint32_t CpuInfo::number_of_cores_ = 0;
+
+uint32_t CpuInfo::DetectNumberOfCores() {
+  if (!number_of_cores_) {
+#if defined(_WIN32)
+    SYSTEM_INFO si;
+    GetSystemInfo(&si);
+    number_of_cores_ = static_cast<uint32_t>(si.dwNumberOfProcessors);
+    WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
+                 "Available number of cores:%d", number_of_cores_);
+
+#elif defined(WEBRTC_LINUX) || defined(WEBRTC_ANDROID)
+    number_of_cores_ = static_cast<uint32_t>(sysconf(_SC_NPROCESSORS_ONLN));
+    WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
+                 "Available number of cores:%d", number_of_cores_);
+
+#elif defined(WEBRTC_MAC)
+    int name[] = {CTL_HW, HW_AVAILCPU};
+    int ncpu;
+    size_t size = sizeof(ncpu);
+    if (0 == sysctl(name, 2, &ncpu, &size, NULL, 0)) {
+      number_of_cores_ = static_cast<uint32_t>(ncpu);
+      WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
+                   "Available number of cores:%d", number_of_cores_);
+    } else {
+      WEBRTC_TRACE(kTraceError, kTraceUtility, -1,
+                   "Failed to get number of cores");
+      number_of_cores_ = 1;
+    }
+#else
+    WEBRTC_TRACE(kTraceWarning, kTraceUtility, -1,
+                 "No function to get number of cores");
+    number_of_cores_ = 1;
+#endif
+  }
+  return number_of_cores_;
+}
+
+}  // namespace webrtc