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

runtime/vm/os_linux.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_LINUX)
 
 #include "vm/os.h"
 
 #include <errno.h>         // NOLINT
+#include <fcntl.h>         // NOLINT
 #include <limits.h>        // NOLINT
 #include <malloc.h>        // NOLINT
-#include <time.h>          // NOLINT
 #include <sys/resource.h>  // NOLINT
+#include <sys/stat.h>      // NOLINT
+#include <sys/syscall.h>   // NOLINT
 #include <sys/time.h>      // NOLINT
 #include <sys/types.h>     // NOLINT
-#include <sys/syscall.h>   // NOLINT
-#include <sys/stat.h>      // NOLINT
-#include <fcntl.h>         // NOLINT
+#include <time.h>          // NOLINT
 #include <unistd.h>        // NOLINT
 
 #include "platform/memory_sanitizer.h"
 #include "platform/utils.h"
 #include "vm/code_observers.h"
 #include "vm/dart.h"
 #include "vm/flags.h"
 #include "vm/isolate.h"
 #include "vm/lockers.h"
 #include "vm/os_thread.h"
 #include "vm/zone.h"
 
-
 namespace dart {
 
 #ifndef PRODUCT
 
 DEFINE_FLAG(bool,
             generate_perf_events_symbols,
             false,
             "Generate events symbols for profiling with perf");
 
 // Linux CodeObservers.
@@ skipping 40 matching lines @@
       (*file_write)(buffer, strlen(buffer), out_file_);
     }
   }
 
  private:
   void* out_file_;
 
   DISALLOW_COPY_AND_ASSIGN(PerfCodeObserver);
 };
 
-
 #endif  // !PRODUCT
 
 const char* OS::Name() {
   return "linux";
 }
 
-
 intptr_t OS::ProcessId() {
   return static_cast<intptr_t>(getpid());
 }
 
-
 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;
   struct tm* error_code = localtime_r(&seconds, tm_result);
   return error_code != NULL;
 }
 
-
 const char* OS::GetTimeZoneName(int64_t seconds_since_epoch) {
   tm decomposed;
   bool succeeded = LocalTime(seconds_since_epoch, &decomposed);
   // If unsuccessful, return an empty string like V8 does.
   return (succeeded && (decomposed.tm_zone != NULL)) ? decomposed.tm_zone : "";
 }
 
-
 int OS::GetTimeZoneOffsetInSeconds(int64_t seconds_since_epoch) {
   tm decomposed;
   bool succeeded = LocalTime(seconds_since_epoch, &decomposed);
   // Even if the offset was 24 hours it would still easily fit into 32 bits.
   // If unsuccessful, return zero like V8 does.
   return succeeded ? static_cast<int>(decomposed.tm_gmtoff) : 0;
 }
 
-
 int OS::GetLocalTimeZoneAdjustmentInSeconds() {
   // TODO(floitsch): avoid excessive calls to tzset?
   tzset();
   // Even if the offset was 24 hours it would still easily fit into 32 bits.
   // Note that Unix and Dart disagree on the sign.
   return static_cast<int>(-timezone);
 }
 
-
 int64_t OS::GetCurrentTimeMillis() {
   return GetCurrentTimeMicros() / 1000;
 }
 
-
 int64_t OS::GetCurrentTimeMicros() {
   // gettimeofday has microsecond resolution.
   struct timeval tv;
   if (gettimeofday(&tv, NULL) < 0) {
     UNREACHABLE();
     return 0;
   }
   return (static_cast<int64_t>(tv.tv_sec) * 1000000) + tv.tv_usec;
 }
 
-
 int64_t OS::GetCurrentMonotonicTicks() {
   struct timespec ts;
   if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) {
     UNREACHABLE();
     return 0;
   }
   // Convert to nanoseconds.
   int64_t result = ts.tv_sec;
   result *= kNanosecondsPerSecond;
   result += ts.tv_nsec;
   return result;
 }
 
-
 int64_t OS::GetCurrentMonotonicFrequency() {
   return kNanosecondsPerSecond;
 }
 
-
 int64_t OS::GetCurrentMonotonicMicros() {
   int64_t ticks = GetCurrentMonotonicTicks();
   ASSERT(GetCurrentMonotonicFrequency() == kNanosecondsPerSecond);
   return ticks / kNanosecondsPerMicrosecond;
 }
 
-
 int64_t OS::GetCurrentThreadCPUMicros() {
   struct timespec ts;
   if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) != 0) {
     UNREACHABLE();
     return -1;
   }
   int64_t result = ts.tv_sec;
   result *= kMicrosecondsPerSecond;
   result += (ts.tv_nsec / kNanosecondsPerMicrosecond);
   return result;
 }
 
-
 // TODO(5411554):  May need to hoist these architecture dependent code
 // into a architecture specific file e.g: os_ia32_linux.cc
 intptr_t OS::ActivationFrameAlignment() {
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64) ||                   \
     defined(TARGET_ARCH_ARM64) || defined(TARGET_ARCH_DBC)
   const int kMinimumAlignment = 16;
 #elif defined(TARGET_ARCH_ARM)
   const int kMinimumAlignment = 8;
 #else
 #error Unsupported architecture.
 #endif
   intptr_t alignment = kMinimumAlignment;
   // TODO(5411554): Allow overriding default stack alignment for
   // testing purposes.
   // Flags::DebugIsInt("stackalign", &alignment);
   ASSERT(Utils::IsPowerOfTwo(alignment));
   ASSERT(alignment >= kMinimumAlignment);
   return alignment;
 }
 
-
 intptr_t OS::PreferredCodeAlignment() {
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64) ||                   \
     defined(TARGET_ARCH_ARM64) || defined(TARGET_ARCH_DBC)
   const int kMinimumAlignment = 32;
 #elif defined(TARGET_ARCH_ARM)
   const int kMinimumAlignment = 16;
 #else
 #error Unsupported architecture.
 #endif
   intptr_t alignment = kMinimumAlignment;
   // TODO(5411554): Allow overriding default code alignment for
   // testing purposes.
   // Flags::DebugIsInt("codealign", &alignment);
   ASSERT(Utils::IsPowerOfTwo(alignment));
   ASSERT(alignment >= kMinimumAlignment);
   ASSERT(alignment <= OS::kMaxPreferredCodeAlignment);
   return alignment;
 }
 
-
 int OS::NumberOfAvailableProcessors() {
   return sysconf(_SC_NPROCESSORS_ONLN);
 }
 
-
 uintptr_t OS::MaxRSS() {
   struct rusage usage;
   usage.ru_maxrss = 0;
   int r = getrusage(RUSAGE_SELF, &usage);
   ASSERT(r == 0);
   return usage.ru_maxrss * KB;
 }
 
-
 void OS::Sleep(int64_t millis) {
   int64_t micros = millis * kMicrosecondsPerMillisecond;
   SleepMicros(micros);
 }
 
-
 void OS::SleepMicros(int64_t micros) {
   struct timespec req;  // requested.
   struct timespec rem;  // remainder.
   int64_t seconds = micros / kMicrosecondsPerSecond;
   micros = micros - seconds * kMicrosecondsPerSecond;
   int64_t nanos = micros * kNanosecondsPerMicrosecond;
   req.tv_sec = seconds;
   req.tv_nsec = nanos;
   while (true) {
     int r = nanosleep(&req, &rem);
     if (r == 0) {
       break;
     }
     // We should only ever see an interrupt error.
     ASSERT(errno == EINTR);
     // Copy remainder into requested and repeat.
     req = rem;
   }
 }
 
-
 // TODO(regis, iposva): When this function is no longer called from the
 // CodeImmutability test in object_test.cc, it will be called only from the
 // simulator, which means that only the Intel implementation is needed.
 void OS::DebugBreak() {
   __builtin_trap();
 }
 
-
 uintptr_t DART_NOINLINE OS::GetProgramCounter() {
   return reinterpret_cast<uintptr_t>(
       __builtin_extract_return_addr(__builtin_return_address(0)));
 }
 
-
 char* OS::StrNDup(const char* s, intptr_t n) {
   return strndup(s, n);
 }
 
-
 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) {
   MSAN_UNPOISON(str, size);
   int retval = vsnprintf(str, size, format, args);
   if (retval < 0) {
     FATAL1("Fatal error in OS::VSNPrint with format '%s'", format);
   }
   return retval;
 }
 
-
 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 = strtoll(str, &endptr, base);
   return ((errno == 0) && (endptr != str) && (*endptr == 0));
 }
 
-
 void OS::RegisterCodeObservers() {
 #ifndef PRODUCT
   if (FLAG_generate_perf_events_symbols) {
     CodeObservers::Register(new PerfCodeObserver);
   }
 #endif  // !PRODUCT
 }
 
-
 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;
 }
 
-
 void OS::Shutdown() {}
 
-
 void OS::Abort() {
   abort();
 }
 
-
 void OS::Exit(int code) {
   exit(code);
 }
 
 }  // namespace dart
 
 #endif  // defined(HOST_OS_LINUX)