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// -*- C++ -*-

// Utility subroutines for the C++ library testsuite. 

//

// Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009

// Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

//

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

//

#include <testsuite_hooks.h>

#ifdef _GLIBCXX_RES_LIMITS

#include <unistd.h>

#include <sys/time.h>

#include <sys/resource.h>

#endif

#include <list>

#include <string>

#include <stdexcept>

#include <cstddef>

#include <clocale>

#include <cstdlib>

#include <locale>

#include <cxxabi.h>

// If we have <sys/types.h>, <sys/ipc.h>, and <sys/sem.h>, then assume

// that System V semaphores are available.

#if defined(_GLIBCXX_HAVE_SYS_TYPES_H)          \

    && defined(_GLIBCXX_HAVE_SYS_IPC_H)         \

    && defined(_GLIBCXX_HAVE_SYS_SEM_H)

#define _GLIBCXX_SYSV_SEM

#endif

#ifdef _GLIBCXX_SYSV_SEM

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/sem.h>

#endif

namespace __gnu_test

{

#ifdef _GLIBCXX_RES_LIMITS

  void

  set_memory_limits(float size)

  {

    struct rlimit r;

    // Cater to the absence of rlim_t.

    __typeof__ (r.rlim_cur) limit = (__typeof__ (r.rlim_cur))(size * 1048576);

    // Heap size, seems to be common.

#if _GLIBCXX_HAVE_LIMIT_DATA

    getrlimit(RLIMIT_DATA, &r);

    r.rlim_cur = limit;

    setrlimit(RLIMIT_DATA, &r);

#endif

    // Resident set size.

#if _GLIBCXX_HAVE_LIMIT_RSS

    getrlimit(RLIMIT_RSS, &r);

    r.rlim_cur = limit;

    setrlimit(RLIMIT_RSS, &r);

#endif

    // Mapped memory (brk + mmap).

#if _GLIBCXX_HAVE_LIMIT_VMEM

    getrlimit(RLIMIT_VMEM, &r);

    r.rlim_cur = limit;

    setrlimit(RLIMIT_VMEM, &r);

#endif

    // Virtual memory.  On x86_64-linux, the default is -z

    // max-page-size=0x200000 which means up to 2MB of address space

    // are accounted for PROT_NONE mappings between text and data

    // segments of each shared library.  There are 4 shared libs

    // involved in addition to the dynamic linker, maybe 5 if libgomp

    // is being used as well.  Use at least 20MB address space limit.

#if defined(__x86_64__) && defined(__linux__)

    if (limit < 20971520)

      limit = 20971520;

#endif

    // On HP-UX 11.23, a trivial C++ program that sets RLIMIT_AS to

    // anything less than 128MB cannot "malloc" even 1K of memory.

    // Therefore, we skip RLIMIT_AS on HP-UX.

#if _GLIBCXX_HAVE_LIMIT_AS && !defined(__hpux__)

    getrlimit(RLIMIT_AS, &r);

    r.rlim_cur = limit;

    setrlimit(RLIMIT_AS, &r);

#endif

  }

#else

  void

  set_memory_limits(float) { }

#endif 

#ifdef _GLIBCXX_RES_LIMITS

  void

  set_file_limit(unsigned long size)

  {

#if _GLIBCXX_HAVE_LIMIT_FSIZE

    struct rlimit r;

    // Cater to the absence of rlim_t.

    __typeof__ (r.rlim_cur) limit = (__typeof__ (r.rlim_cur))(size);

    getrlimit(RLIMIT_FSIZE, &r);

    r.rlim_cur = limit;

    setrlimit(RLIMIT_FSIZE, &r);

#endif

  }

#else

  void

  set_file_limit(unsigned long) { }

#endif 

  void

  verify_demangle(const char* mangled, const char* wanted)

  {

    int status = 0;

    const char* s = abi::__cxa_demangle(mangled, 0, 0, &status);

    if (!s)

      {

        switch (status)

          {

          case 0:

            s = "error code = 0: success";

            break;

          case -1:

            s = "error code = -1: memory allocation failure";

            break;

          case -2:

            s = "error code = -2: invalid mangled name";

            break;

          case -3:

            s = "error code = -3: invalid arguments";

            break;

          default:

            s = "error code unknown - who knows what happened";

          }

      }

    std::string w(wanted);

    if (w != s)

      std::__throw_runtime_error(s);

  }

  void

  run_tests_wrapped_locale(const char* name, const func_callback& l)

  {

    using namespace std;

    // Set the global locale. 

    locale loc_name = locale(name);

    locale orig = locale::global(loc_name);

    const char* res = setlocale(LC_ALL, name);

    if (res != NULL)

      {

        string preLC_ALL = res;

        const func_callback::test_type* tests = l.tests();

        for (int i = 0; i < l.size(); ++i)

          (*tests[i])();

        string postLC_ALL= setlocale(LC_ALL, NULL);

        VERIFY( preLC_ALL == postLC_ALL );

      }

    else

      {

        string s("LC_ALL for ");

        s += name;

        __throw_runtime_error(s.c_str());

      }

  }

  void

  run_tests_wrapped_env(const char* name, const char* env,

                        const func_callback& l)

  {

    using namespace std;

#ifdef _GLIBCXX_HAVE_SETENV 

    // Set the global locale. 

    locale loc_name = locale(name);

    locale orig = locale::global(loc_name);

    // Set environment variable env to value in name. 

    const char* oldENV = getenv(env);

    if (!setenv(env, name, 1))

      {

        const func_callback::test_type* tests = l.tests();

        for (int i = 0; i < l.size(); ++i)

          (*tests[i])();

        setenv(env, oldENV ? oldENV : "", 1);

      }

    else

      {

        string s(env);

        s += string(" to ");

        s += string(name);

        __throw_runtime_error(s.c_str());

      }

#endif

  }

  object_counter::size_type  object_counter::count = 0;

  unsigned int copy_constructor::count_ = 0;

  unsigned int copy_constructor::throw_on_ = 0;

  unsigned int assignment_operator::count_ = 0;

  unsigned int assignment_operator::throw_on_ = 0;

  unsigned int destructor::_M_count = 0;

  int copy_tracker::next_id_ = 0;

#ifdef _GLIBCXX_SYSV_SEM

  // This union is not declared in system headers.  Instead, it must

  // be defined by user programs.

  union semun

  {

    int val;

    struct semid_ds *buf;

    unsigned short *array;

  };

#endif

  semaphore::semaphore()

  {

#ifdef _GLIBCXX_SYSV_SEM

    // Remeber the PID for the process that created the semaphore set

    // so that only one process will destroy the set.

    pid_ = getpid();

    // GLIBC does not define SEM_R and SEM_A.

#ifndef SEM_R

#define SEM_R 0400

#endif

#ifndef SEM_A

#define SEM_A 0200

#endif

    // Get a semaphore set with one semaphore.

    sem_set_ = semget(IPC_PRIVATE, 1, SEM_R | SEM_A);

    if (sem_set_ == -1)

      std::__throw_runtime_error("could not obtain semaphore set");

    // Initialize the semaphore.

    union semun val;

    val.val = 0;

    if (semctl(sem_set_, 0, SETVAL, val) == -1)

      std::__throw_runtime_error("could not initialize semaphore");

#else

    // There are no semaphores on this system.  We have no way to mark

    // a test as "unsupported" at runtime, so we just exit, pretending

    // that the test passed.

    exit(0);

#endif

  }

  semaphore::~semaphore()

  {

#ifdef _GLIBCXX_SYSV_SEM

    union semun val;

    val.val = 0; // Avoid uninitialized variable warning.

    // Destroy the semaphore set only in the process that created it. 

    if (pid_ == getpid())

      semctl(sem_set_, 0, IPC_RMID, val);

#endif

  }

  void

  semaphore::signal()

  {

#ifdef _GLIBCXX_SYSV_SEM

    struct sembuf op[1] =

      {

        { 0, 1, 0 }

      };

    if (semop(sem_set_, op, 1) == -1)

      std::__throw_runtime_error("could not signal semaphore");

#endif

  }

  void

  semaphore::wait()

  {

#ifdef _GLIBCXX_SYSV_SEM

    struct sembuf op[1] =

      {

        { 0, -1, SEM_UNDO }

      };

    if (semop(sem_set_, op, 1) == -1)

      std::__throw_runtime_error("could not wait for semaphore");

#endif    

  }

  // For use in 22_locale/time_get and time_put.

  std::tm

  test_tm(int sec, int min, int hour, int mday, int mon,

          int year, int wday, int yday, int isdst)

  {

    static std::tm tmp;

    tmp.tm_sec = sec;

    tmp.tm_min = min;

    tmp.tm_hour = hour;

    tmp.tm_mday = mday;

    tmp.tm_mon = mon;

    tmp.tm_year = year;

    tmp.tm_wday = wday;

    tmp.tm_yday = yday;

    tmp.tm_isdst = isdst;

    return tmp;

  }

} // namespace __gnu_test