Remove base/synchronization/, move src/ to util/
Moving src/ to util/ (and removing src/ from include path) was necessary
so that Semaphore could live in "util/semaphore.h" rather than having a
different name (because <semaphore.h> is where sem_t is on Linux).
Unfortunately this required touching ~everything because build_config.h
needed to be changed to util/build_config.h.
Change-Id: I4c913542c1f1504dca1c82e6ab6d99ef263f5cac
Reviewed-on: https://gn-review.googlesource.com/1680
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Brett Wilson <brettw@chromium.org>
diff --git a/util/sys_info.cc b/util/sys_info.cc
new file mode 100644
index 0000000..a1ce3e9
--- /dev/null
+++ b/util/sys_info.cc
@@ -0,0 +1,81 @@
+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "util/sys_info.h"
+
+#include "base/logging.h"
+#include "util/build_config.h"
+
+#if defined(OS_POSIX)
+#include <sys/utsname.h>
+#include <unistd.h>
+#endif
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+std::string OperatingSystemArchitecture() {
+#if defined(OS_POSIX)
+ struct utsname info;
+ if (uname(&info) < 0) {
+ NOTREACHED();
+ return std::string();
+ }
+ std::string arch(info.machine);
+ if (arch == "i386" || arch == "i486" || arch == "i586" || arch == "i686") {
+ arch = "x86";
+ } else if (arch == "amd64") {
+ arch = "x86_64";
+ } else if (std::string(info.sysname) == "AIX") {
+ arch = "ppc64";
+ }
+ return arch;
+#elif defined(OS_WIN)
+ SYSTEM_INFO system_info = {};
+ ::GetNativeSystemInfo(&system_info);
+ switch (system_info.wProcessorArchitecture) {
+ case PROCESSOR_ARCHITECTURE_INTEL:
+ return "x86";
+ case PROCESSOR_ARCHITECTURE_AMD64:
+ return "x86_64";
+ case PROCESSOR_ARCHITECTURE_IA64:
+ return "ia64";
+ }
+ return std::string();
+#else
+#error
+#endif
+}
+
+int NumberOfProcessors() {
+#if defined(OS_POSIX)
+ // sysconf returns the number of "logical" (not "physical") processors on both
+ // Mac and Linux. So we get the number of max available "logical" processors.
+ //
+ // Note that the number of "currently online" processors may be fewer than the
+ // returned value of NumberOfProcessors(). On some platforms, the kernel may
+ // make some processors offline intermittently, to save power when system
+ // loading is low.
+ //
+ // One common use case that needs to know the processor count is to create
+ // optimal number of threads for optimization. It should make plan according
+ // to the number of "max available" processors instead of "currently online"
+ // ones. The kernel should be smart enough to make all processors online when
+ // it has sufficient number of threads waiting to run.
+ long res = sysconf(_SC_NPROCESSORS_CONF);
+ if (res == -1) {
+ NOTREACHED();
+ return 1;
+ }
+
+ return static_cast<int>(res);
+#elif defined(OS_WIN)
+ SYSTEM_INFO system_info = {};
+ ::GetNativeSystemInfo(&system_info);
+ return system_info.dwNumberOfProcessors;
+#else
+#error
+#endif
+}
