CSE2410 Fall 2014 Bounce

// Copyright 2009 the V8 project authors. All rights reserved.

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

//

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above

//       copyright notice, this list of conditions and the following

//       disclaimer in the documentation and/or other materials provided

//       with the distribution.

//     * Neither the name of Google Inc. nor the names of its

//       contributors may be used to endorse or promote products derived

//       from this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Platform specific code for POSIX goes here. This is not a platform on its

// own but contains the parts which are the same across POSIX platforms Linux,

// Mac OS and FreeBSD.

#include <unistd.h>

#include <errno.h>

#include <time.h>

#include <sys/socket.h>

#include <sys/resource.h>

#include <sys/time.h>

#include <sys/types.h>

#include <arpa/inet.h>

#include <netinet/in.h>

#include <netdb.h>

#include "v8.h"

#include "platform.h"

namespace v8 { namespace internal {

// ----------------------------------------------------------------------------

// POSIX date/time support.

//

int OS::GetUserTime(uint32_t* secs,  uint32_t* usecs) {

  struct rusage usage;

  if (getrusage(RUSAGE_SELF, &usage) < 0) return -1;

  *secs = usage.ru_utime.tv_sec;

  *usecs = usage.ru_utime.tv_usec;

  return 0;

}

double OS::TimeCurrentMillis() {

  struct timeval tv;

  if (gettimeofday(&tv, NULL) < 0) return 0.0;

  return (static_cast<double>(tv.tv_sec) * 1000) +

         (static_cast<double>(tv.tv_usec) / 1000);

}

int64_t OS::Ticks() {

  // gettimeofday has microsecond resolution.

  struct timeval tv;

  if (gettimeofday(&tv, NULL) < 0)

    return 0;

  return (static_cast<int64_t>(tv.tv_sec) * 1000000) + tv.tv_usec;

}

char* OS::LocalTimezone(double time) {

  time_t tv = static_cast<time_t>(floor(time/msPerSecond));

  struct tm* t = localtime(&tv);

  return const_cast<char*>(t->tm_zone);

}

double OS::DaylightSavingsOffset(double time) {

  time_t tv = static_cast<time_t>(floor(time/msPerSecond));

  struct tm* t = localtime(&tv);

  return t->tm_isdst > 0 ? 3600 * msPerSecond : 0;

}

double OS::LocalTimeOffset() {

  time_t tv = time(NULL);

  struct tm* t = localtime(&tv);

  // tm_gmtoff includes any daylight savings offset, so subtract it.

  return static_cast<double>(t->tm_gmtoff * msPerSecond -

                             (t->tm_isdst > 0 ? 3600 * msPerSecond : 0));

}

// ----------------------------------------------------------------------------

// POSIX stdio support.

//

FILE* OS::FOpen(const char* path, const char* mode) {

  return fopen(path, mode);

}

const char* OS::LogFileOpenMode = "w";

void OS::Print(const char* format, ...) {

  va_list args;

  va_start(args, format);

  VPrint(format, args);

  va_end(args);

}

void OS::VPrint(const char* format, va_list args) {

  vprintf(format, args);

}

void OS::PrintError(const char* format, ...) {

  va_list args;

  va_start(args, format);

  VPrintError(format, args);

  va_end(args);

}

void OS::VPrintError(const char* format, va_list args) {

  vfprintf(stderr, format, args);

}

int OS::SNPrintF(Vector<char> str, const char* format, ...) {

  va_list args;

  va_start(args, format);

  int result = VSNPrintF(str, format, args);

  va_end(args);

  return result;

}

int OS::VSNPrintF(Vector<char> str,

                  const char* format,

                  va_list args) {

  int n = vsnprintf(str.start(), str.length(), format, args);

  if (n < 0 || n >= str.length()) {

    str[str.length() - 1] = '\0';

    return -1;

  } else {

    return n;

  }

}

// ----------------------------------------------------------------------------

// POSIX string support.

//

char* OS::StrChr(char* str, int c) {

  return strchr(str, c);

}

void OS::StrNCpy(Vector<char> dest, const char* src, size_t n) {

  strncpy(dest.start(), src, n);

}

// ----------------------------------------------------------------------------

// POSIX socket support.

//

class POSIXSocket : public Socket {

 public:

  explicit POSIXSocket() {

    // Create the socket.

    socket_ = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

  }

  explicit POSIXSocket(int socket): socket_(socket) { }

  virtual ~POSIXSocket() { Shutdown(); }

  // Server initialization.

  bool Bind(const int port);

  bool Listen(int backlog) const;

  Socket* Accept() const;

  // Client initialization.

  bool Connect(const char* host, const char* port);

  // Shutdown socket for both read and write.

  bool Shutdown();

  // Data Transimission

  int Send(const char* data, int len) const;

  int Receive(char* data, int len) const;

  bool SetReuseAddress(bool reuse_address);

  bool IsValid() const { return socket_ != -1; }

 private:

  int socket_;

};

bool POSIXSocket::Bind(const int port) {

  if (!IsValid())  {

    return false;

  }

  sockaddr_in addr;

  memset(&addr, 0, sizeof(addr));

  addr.sin_family = AF_INET;

  addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

  addr.sin_port = htons(port);

  int status = bind(socket_,

                    reinterpret_cast<struct sockaddr *>(&addr),

                    sizeof(addr));

  return status == 0;

}

bool POSIXSocket::Listen(int backlog) const {

  if (!IsValid()) {

    return false;

  }

  int status = listen(socket_, backlog);

  return status == 0;

}

Socket* POSIXSocket::Accept() const {

  if (!IsValid()) {

    return NULL;

  }

  int socket = accept(socket_, NULL, NULL);

  if (socket == -1) {

    return NULL;

  } else {

    return new POSIXSocket(socket);

  }

}

bool POSIXSocket::Connect(const char* host, const char* port) {

  if (!IsValid()) {

    return false;

  }

  // Lookup host and port.

  struct addrinfo *result = NULL;

  struct addrinfo hints;

  memset(&hints, 0, sizeof(addrinfo));

  hints.ai_family = AF_INET;

  hints.ai_socktype = SOCK_STREAM;

  hints.ai_protocol = IPPROTO_TCP;

  int status = getaddrinfo(host, port, &hints, &result);

  if (status != 0) {

    return false;

  }

  // Connect.

  status = connect(socket_, result->ai_addr, result->ai_addrlen);

  freeaddrinfo(result);

  return status == 0;

}

bool POSIXSocket::Shutdown() {

  if (IsValid()) {

    // Shutdown socket for both read and write.

    int status = shutdown(socket_, SHUT_RDWR);

    close(socket_);

    socket_ = -1;

    return status == 0;

  }

  return true;

}

int POSIXSocket::Send(const char* data, int len) const {

  int status = send(socket_, data, len, 0);

  return status;

}

int POSIXSocket::Receive(char* data, int len) const {

  int status = recv(socket_, data, len, 0);

  return status;

}

bool POSIXSocket::SetReuseAddress(bool reuse_address) {

  int on = reuse_address ? 1 : 0;

  int status = setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));

  return status == 0;

}

bool Socket::Setup() {

  // Nothing to do on POSIX.

  return true;

}

int Socket::LastError() {

  return errno;

}

uint16_t Socket::HToN(uint16_t value) {

  return htons(value);

}

uint16_t Socket::NToH(uint16_t value) {

  return ntohs(value);

}

uint32_t Socket::HToN(uint32_t value) {

  return htonl(value);

}

uint32_t Socket::NToH(uint32_t value) {

  return ntohl(value);

}

Socket* OS::CreateSocket() {

  return new POSIXSocket();

}

} }  // namespace v8::internal