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// Copyright 2019 Proyectos y Sistemas de Mantenimiento SL (eProsima).
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*!
* @file Mutex.cpp
*
*/
#include "TMutex.hpp"
#include <algorithm>
#include <array>
#include <cassert>
#include <pthread.h>
// TODO contar que solo bloquea una vez y nunca mas despues de timeout.
// TODO si se bloquea el dos, que no se bloqueen los posteriores
using namespace eprosima::fastdds;
namespace eprosima {
namespace fastdds {
std::atomic<pid_t> g_tmutex_thread_pid(0);
// *INDENT-OFF* Uncrustify parse this as a function declaration instead of a function pointer.
int (*g_origin_lock_func)(pthread_mutex_t*){nullptr};
int (*g_origin_timedlock_func)(pthread_mutex_t*, const struct timespec*){nullptr};
int (*g_origin_clocklock_func)(pthread_mutex_t*, clockid_t, const struct timespec*){nullptr};
// *INDENT-ON*
typedef struct
{
LockType type;
pthread_mutex_t* mutex;
uint32_t count;
} tmutex_record;
constexpr size_t g_tmutex_records_max_length = 30;
std::array<tmutex_record, g_tmutex_records_max_length> g_tmutex_records{{{LockType::LOCK, nullptr, 0}}};
int32_t g_tmutex_records_end = -1;
int32_t tmutex_find_record(
pthread_mutex_t* mutex)
{
int32_t returned_position = -1;
for (int32_t position = 0; position <= g_tmutex_records_end; ++position)
{
if (mutex == g_tmutex_records[position].mutex)
{
returned_position = position;
break;
}
}
return returned_position;
}
} //namespace fastdds
} //namespace eprosima
void eprosima::fastdds::tmutex_start_recording()
{
assert(0 == g_tmutex_thread_pid);
g_tmutex_thread_pid = GET_TID();
g_tmutex_records = {{{LockType::LOCK, nullptr, 0}}};
g_tmutex_records_end = -1;
}
void eprosima::fastdds::tmutex_stop_recording()
{
assert(0 < g_tmutex_thread_pid);
g_tmutex_thread_pid = 0;
}
void eprosima::fastdds::tmutex_record_mutex_(
LockType type,
pthread_mutex_t* mutex)
{
assert(0 < g_tmutex_thread_pid);
// Search if mutex already has an entry.
int32_t position = tmutex_find_record(mutex);
if (-1 >= position)
{
assert(g_tmutex_records_max_length > size_t(g_tmutex_records_end + 1));
position = ++g_tmutex_records_end;
g_tmutex_records[position].type = type;
g_tmutex_records[position].mutex = mutex;
}
++g_tmutex_records[position].count;
}
size_t eprosima::fastdds::tmutex_get_num_mutexes()
{
assert(0 == g_tmutex_thread_pid);
return g_tmutex_records_end + 1;
}
size_t eprosima::fastdds::tmutex_get_num_lock_type()
{
size_t counter = 0;
if (-1 < g_tmutex_records_end)
{
std::for_each(g_tmutex_records.begin(), g_tmutex_records.begin() + g_tmutex_records_end + 1,
[&](const tmutex_record& record)
{
if (record.type == LockType::LOCK)
{
++counter;
}
});
}
return counter;
}
size_t eprosima::fastdds::tmutex_get_num_timedlock_type()
{
size_t counter = 0;
if (-1 < g_tmutex_records_end)
{
std::for_each(g_tmutex_records.begin(), g_tmutex_records.begin() + g_tmutex_records_end + 1,
[&](const tmutex_record& record)
{
if (record.type == LockType::TIMED_LOCK)
{
++counter;
}
});
}
return counter;
}
pthread_mutex_t* eprosima::fastdds::tmutex_get_mutex(
const size_t index)
{
assert(index <= size_t(g_tmutex_records_end));
return g_tmutex_records[index].mutex;
}
bool eprosima::fastdds::tmutex_lock_mutex(
const size_t index)
{
assert(index <= size_t(g_tmutex_records_end));
if (LockType::TIMED_LOCK == g_tmutex_records[index].type)
{
if (g_origin_lock_func != nullptr)
{
(*g_origin_lock_func)(g_tmutex_records[index].mutex);
}
return true;
}
return false;
}
void eprosima::fastdds::tmutex_unlock_mutex(
const size_t index)
{
assert(index <= size_t(g_tmutex_records_end));
pthread_mutex_unlock(g_tmutex_records[index].mutex);
}
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