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

runtime/vm/virtual_memory_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/virtual_memory.h"
 
 #include <sys/mman.h>  // NOLINT
 #include <unistd.h>    // NOLINT
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 
 #include "vm/isolate.h"
 
 namespace dart {
 
 // standard MAP_FAILED causes "error: use of old-style cast" as it
 // defines MAP_FAILED as ((void *) -1)
 #undef MAP_FAILED
 #define MAP_FAILED reinterpret_cast<void*>(-1)
 
 uword VirtualMemory::page_size_ = 0;
 
-
 void VirtualMemory::InitOnce() {
   page_size_ = getpagesize();
 }
 
-
 VirtualMemory* VirtualMemory::ReserveInternal(intptr_t size) {
   void* address = mmap(NULL, size, PROT_NONE,
                        MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, -1, 0);
   if (address == MAP_FAILED) {
     return NULL;
   }
   MemoryRegion region(address, size);
   return new VirtualMemory(region);
 }
 
-
 static void unmap(void* address, intptr_t size) {
   if (size == 0) {
     return;
   }
 
   if (munmap(address, size) != 0) {
     FATAL("munmap failed\n");
   }
 }
 
-
 VirtualMemory::~VirtualMemory() {
   if (vm_owns_region()) {
     unmap(address(), reserved_size_);
   }
 }
 
-
 bool VirtualMemory::FreeSubSegment(int32_t handle,
                                    void* address,
                                    intptr_t size) {
   unmap(address, size);
   return true;
 }
 
-
 bool VirtualMemory::Commit(uword addr,
                            intptr_t size,
                            bool executable,
                            const char* name) {
   ASSERT(Contains(addr));
   ASSERT(Contains(addr + size) || (addr + size == end()));
   int prot = PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0);
   void* address = mmap(reinterpret_cast<void*>(addr), size, prot,
                        MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
   if (address == MAP_FAILED) {
     return false;
   }
   return true;
 }
 
-
 bool VirtualMemory::Protect(void* address, intptr_t size, Protection mode) {
   ASSERT(Thread::Current()->IsMutatorThread() ||
          Isolate::Current()->mutator_thread()->IsAtSafepoint());
   uword start_address = reinterpret_cast<uword>(address);
   uword end_address = start_address + size;
   uword page_address = Utils::RoundDown(start_address, PageSize());
   int prot = 0;
   switch (mode) {
     case kNoAccess:
       prot = PROT_NONE;
       break;
     case kReadOnly:
       prot = PROT_READ;
       break;
     case kReadWrite:
       prot = PROT_READ | PROT_WRITE;
       break;
     case kReadExecute:
       prot = PROT_READ | PROT_EXEC;
       break;
     case kReadWriteExecute:
       prot = PROT_READ | PROT_WRITE | PROT_EXEC;
       break;
   }
   return (mprotect(reinterpret_cast<void*>(page_address),
                    end_address - page_address, prot) == 0);
 }
 
-
 }  // namespace dart
 
 #endif  // defined(HOST_OS_LINUX)