VM: Re-format to use at most one newline between functions

runtime/vm/os_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(HOST_OS_WINDOWS)
 
 #include "vm/os.h"
 
 #include <malloc.h>   // NOLINT
 #include <process.h>  // NOLINT
 #include <psapi.h>    // NOLINT
 #include <time.h>     // NOLINT
 
+#include "platform/assert.h"
 #include "platform/utils.h"
-#include "platform/assert.h"
 #include "vm/os_thread.h"
 #include "vm/zone.h"
 
 namespace dart {
 
 // Defined in vm/os_thread_win.cc
 extern bool private_flag_windows_run_tls_destructors;
 
 const char* OS::Name() {
   return "windows";
 }
 
-
 intptr_t OS::ProcessId() {
   return static_cast<intptr_t>(GetCurrentProcessId());
 }
 
-
 // As a side-effect sets the globals _timezone, _daylight and _tzname.
 static bool LocalTime(int64_t seconds_since_epoch, tm* tm_result) {
   time_t seconds = static_cast<time_t>(seconds_since_epoch);
   if (seconds != seconds_since_epoch) {
     return false;
   }
   // localtime_s implicitly sets _timezone, _daylight and _tzname.
   errno_t error_code = localtime_s(tm_result, &seconds);
   return error_code == 0;
 }
 
-
 static int GetDaylightSavingBiasInSeconds() {
   TIME_ZONE_INFORMATION zone_information;
   memset(&zone_information, 0, sizeof(zone_information));
   if (GetTimeZoneInformation(&zone_information) == TIME_ZONE_ID_INVALID) {
     // By default the daylight saving offset is an hour.
     return -60 * 60;
   } else {
     return static_cast<int>(zone_information.DaylightBias * 60);
   }
 }
 
-
 const char* OS::GetTimeZoneName(int64_t seconds_since_epoch) {
   TIME_ZONE_INFORMATION zone_information;
   memset(&zone_information, 0, sizeof(zone_information));
 
   // Initialize and grab the time zone data.
   _tzset();
   DWORD status = GetTimeZoneInformation(&zone_information);
   if (GetTimeZoneInformation(&zone_information) == TIME_ZONE_ID_INVALID) {
     // If we can't get the time zone data, the Windows docs indicate that we
     // are probably out of memory. Return an empty string.
@@ skipping 13 matching lines @@
   wchar_t* wchar_name = daylight_savings ? zone_information.DaylightName
                                          : zone_information.StandardName;
   intptr_t utf8_len =
       WideCharToMultiByte(CP_UTF8, 0, wchar_name, -1, NULL, 0, NULL, NULL);
   char* name = Thread::Current()->zone()->Alloc<char>(utf8_len + 1);
   WideCharToMultiByte(CP_UTF8, 0, wchar_name, -1, name, utf8_len, NULL, NULL);
   name[utf8_len] = '\0';
   return name;
 }
 
-
 int OS::GetTimeZoneOffsetInSeconds(int64_t seconds_since_epoch) {
   tm decomposed;
   // LocalTime will set _timezone.
   bool succeeded = LocalTime(seconds_since_epoch, &decomposed);
   if (succeeded) {
     int inDaylightSavingsTime = decomposed.tm_isdst;
     ASSERT(inDaylightSavingsTime == 0 || inDaylightSavingsTime == 1);
     // Dart and Windows disagree on the sign of the bias.
     int offset = static_cast<int>(-_timezone);
     if (inDaylightSavingsTime == 1) {
       static int daylight_bias = GetDaylightSavingBiasInSeconds();
       // Subtract because windows and Dart disagree on the sign.
       offset = offset - daylight_bias;
     }
     return offset;
   } else {
     // Return zero like V8 does.
     return 0;
   }
 }
 
-
 int OS::GetLocalTimeZoneAdjustmentInSeconds() {
   // TODO(floitsch): avoid excessive calls to _tzset?
   _tzset();
   // Dart and Windows disagree on the sign of the bias.
   return static_cast<int>(-_timezone);
 }
 
-
 int64_t OS::GetCurrentTimeMillis() {
   return GetCurrentTimeMicros() / 1000;
 }
 
-
 int64_t OS::GetCurrentTimeMicros() {
   static const int64_t kTimeEpoc = 116444736000000000LL;
   static const int64_t kTimeScaler = 10;  // 100 ns to us.
 
   // Although win32 uses 64-bit integers for representing timestamps,
   // these are packed into a FILETIME structure. The FILETIME
   // structure is just a struct representing a 64-bit integer. The
   // TimeStamp union allows access to both a FILETIME and an integer
   // representation of the timestamp. The Windows timestamp is in
   // 100-nanosecond intervals since January 1, 1601.
   union TimeStamp {
     FILETIME ft_;
     int64_t t_;
   };
   TimeStamp time;
   GetSystemTimeAsFileTime(&time.ft_);
   return (time.t_ - kTimeEpoc) / kTimeScaler;
 }
 
-
 static int64_t qpc_ticks_per_second = 0;
 
-
 int64_t OS::GetCurrentMonotonicTicks() {
   if (qpc_ticks_per_second == 0) {
     // QueryPerformanceCounter not supported, fallback.
     return GetCurrentTimeMicros();
   }
   // Grab performance counter value.
   LARGE_INTEGER now;
   QueryPerformanceCounter(&now);
   return static_cast<int64_t>(now.QuadPart);
 }
 
-
 int64_t OS::GetCurrentMonotonicFrequency() {
   if (qpc_ticks_per_second == 0) {
     // QueryPerformanceCounter not supported, fallback.
     return kMicrosecondsPerSecond;
   }
   return qpc_ticks_per_second;
 }
 
-
 int64_t OS::GetCurrentMonotonicMicros() {
   int64_t ticks = GetCurrentMonotonicTicks();
   int64_t frequency = GetCurrentMonotonicFrequency();
 
   // Convert to microseconds.
   int64_t seconds = ticks / frequency;
   int64_t leftover_ticks = ticks - (seconds * frequency);
   int64_t result = seconds * kMicrosecondsPerSecond;
   result += ((leftover_ticks * kMicrosecondsPerSecond) / frequency);
   return result;
 }
 
-
 int64_t OS::GetCurrentThreadCPUMicros() {
   // TODO(johnmccutchan): Implement. See base/time_win.cc for details.
   return -1;
 }
 
-
 intptr_t OS::ActivationFrameAlignment() {
 #if defined(TARGET_ARCH_ARM64)
   return 16;
 #elif defined(TARGET_ARCH_ARM)
   return 8;
 #elif defined(_WIN64)
   // Windows 64-bit ABI requires the stack to be 16-byte aligned.
   return 16;
 #else
   // No requirements on Win32.
   return 1;
 #endif
 }
 
-
 intptr_t OS::PreferredCodeAlignment() {
   ASSERT(32 <= OS::kMaxPreferredCodeAlignment);
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64) ||                   \
     defined(TARGET_ARCH_ARM64) || defined(TARGET_ARCH_DBC)
   return 32;
 #elif defined(TARGET_ARCH_ARM)
   return 16;
 #else
 #error Unsupported architecture.
 #endif
 }
 
-
 int OS::NumberOfAvailableProcessors() {
   SYSTEM_INFO info;
   GetSystemInfo(&info);
   return info.dwNumberOfProcessors;
 }
 
-
 uintptr_t OS::MaxRSS() {
   PROCESS_MEMORY_COUNTERS pmc;
   GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc));
   return pmc.PeakWorkingSetSize;
 }
 
-
 void OS::Sleep(int64_t millis) {
   ::Sleep(millis);
 }
 
-
 void OS::SleepMicros(int64_t micros) {
   // Windows only supports millisecond sleeps.
   if (micros < kMicrosecondsPerMillisecond) {
     // Calling ::Sleep with 0 has no determined behaviour, round up.
     micros = kMicrosecondsPerMillisecond;
   }
   OS::Sleep(micros / kMicrosecondsPerMillisecond);
 }
 
-
 void OS::DebugBreak() {
 #if defined(_MSC_VER)
   // Microsoft Visual C/C++ or drop-in replacement.
   __debugbreak();
 #elif defined(__GCC__)
   __builtin_trap();
 #else
   // Microsoft style assembly.
   __asm {
     int 3
   }
 #endif
 }
 
-
 DART_NOINLINE uintptr_t OS::GetProgramCounter() {
   return reinterpret_cast<uintptr_t>(_ReturnAddress());
 }
 
-
 char* OS::StrNDup(const char* s, intptr_t n) {
   intptr_t len = strlen(s);
   if ((n < 0) || (len < 0)) {
     return NULL;
   }
   if (n < len) {
     len = n;
   }
   char* result = reinterpret_cast<char*>(malloc(len + 1));
   if (result == NULL) {
     return NULL;
   }
   result[len] = '\0';
   return reinterpret_cast<char*>(memmove(result, s, len));
 }
 
-
 intptr_t OS::StrNLen(const char* s, intptr_t n) {
   return strnlen(s, n);
 }
 
-
 void OS::Print(const char* format, ...) {
   va_list args;
   va_start(args, format);
   VFPrint(stdout, format, args);
   va_end(args);
 }
 
-
 void OS::VFPrint(FILE* stream, const char* format, va_list args) {
   vfprintf(stream, format, args);
   fflush(stream);
 }
 
-
 int OS::SNPrint(char* str, size_t size, const char* format, ...) {
   va_list args;
   va_start(args, format);
   int retval = VSNPrint(str, size, format, args);
   va_end(args);
   return retval;
 }
 
-
 int OS::VSNPrint(char* str, size_t size, const char* format, va_list args) {
   if (str == NULL || size == 0) {
     int retval = _vscprintf(format, args);
     if (retval < 0) {
       FATAL1("Fatal error in OS::VSNPrint with format '%s'", format);
     }
     return retval;
   }
   va_list args_copy;
   va_copy(args_copy, args);
@@ skipping 14 matching lines @@
   // Make sure to zero-terminate the string if the output was
   // truncated or if there was an error.
   // The static cast is safe here as we have already determined that 'written'
   // is >= 0.
   if (static_cast<size_t>(written) >= size) {
     str[size - 1] = '\0';
   }
   return written;
 }
 
-
 char* OS::SCreate(Zone* zone, const char* format, ...) {
   va_list args;
   va_start(args, format);
   char* buffer = VSCreate(zone, format, args);
   va_end(args);
   return buffer;
 }
 
-
 char* OS::VSCreate(Zone* zone, const char* format, va_list args) {
   // Measure.
   va_list measure_args;
   va_copy(measure_args, args);
   intptr_t len = VSNPrint(NULL, 0, format, measure_args);
   va_end(measure_args);
 
   char* buffer;
   if (zone) {
     buffer = zone->Alloc<char>(len + 1);
   } else {
     buffer = reinterpret_cast<char*>(malloc(len + 1));
   }
   ASSERT(buffer != NULL);
 
   // Print.
   va_list print_args;
   va_copy(print_args, args);
   VSNPrint(buffer, len + 1, format, print_args);
   va_end(print_args);
   return buffer;
 }
 
-
 bool OS::StringToInt64(const char* str, int64_t* value) {
   ASSERT(str != NULL && strlen(str) > 0 && value != NULL);
   int32_t base = 10;
   char* endptr;
   int i = 0;
   if (str[0] == '-') {
     i = 1;
   }
   if ((str[i] == '0') && (str[i + 1] == 'x' || str[i + 1] == 'X') &&
       (str[i + 2] != '\0')) {
     base = 16;
   }
   errno = 0;
   *value = _strtoi64(str, &endptr, base);
   return ((errno == 0) && (endptr != str) && (*endptr == 0));
 }
 
-
 void OS::RegisterCodeObservers() {}
 
-
 void OS::PrintErr(const char* format, ...) {
   va_list args;
   va_start(args, format);
   VFPrint(stderr, format, args);
   va_end(args);
 }
 
-
 void OS::InitOnce() {
   // TODO(5411554): For now we check that initonce is called only once,
   // Once there is more formal mechanism to call InitOnce we can move
   // this check there.
   static bool init_once_called = false;
   ASSERT(init_once_called == false);
   init_once_called = true;
   // Do not pop up a message box when abort is called.
   _set_abort_behavior(0, _WRITE_ABORT_MSG);
   ThreadLocalData::InitOnce();
   MonitorWaitData::monitor_wait_data_key_ = OSThread::CreateThreadLocal();
   MonitorData::GetMonitorWaitDataForThread();
   LARGE_INTEGER ticks_per_sec;
   if (!QueryPerformanceFrequency(&ticks_per_sec)) {
     qpc_ticks_per_second = 0;
   } else {
     qpc_ticks_per_second = static_cast<int64_t>(ticks_per_sec.QuadPart);
   }
 }
 
-
 void OS::Shutdown() {
   // TODO(zra): Enable once VM can shutdown cleanly.
   // ThreadLocalData::Shutdown();
 }
 
-
 void OS::Abort() {
   // TODO(zra): Remove once VM shuts down cleanly.
   private_flag_windows_run_tls_destructors = false;
   abort();
 }
 
-
 void OS::Exit(int code) {
   // TODO(zra): Remove once VM shuts down cleanly.
   private_flag_windows_run_tls_destructors = false;
   // On Windows we use ExitProcess so that threads can't clobber the exit_code.
   // See: https://code.google.com/p/nativeclient/issues/detail?id=2870
   ::ExitProcess(code);
 }
 
 }  // namespace dart
 
 #endif  // defined(HOST_OS_WINDOWS)