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#include <deque>
#include <vector>
#include <string>
extern "C" {
#include "../threads/lib/THThread.h"
#include "Example.h"
#include "stdlib.h"
#include "stdio.h"
#include "../../nerv/lib/matrix/generic/elem_type.h"
#include "common.h"
extern Matrix* nerv_matrix_cuda_float_create(long nrow, long ncol, Status *status);
void nerv_matrix_cuda_float_copy_fromd(Matrix *a, const Matrix *b,
int a_begin, int b_begin, int b_end,
Status *status);
struct Example
{
std::vector<Matrix *> inputs;
std::string id;
int refcount;
};
struct ExamplesRepository
{
int buffer_size_;
THSemaphore *full_semaphore_;
THSemaphore *empty_semaphore_;
THMutex *examples_mutex_;
std::deque<Example*> examples_;
bool done_;
int refcount;
int gpuid;
};
Example* Example_new()
{
Example *example = new Example; //(Example*)malloc(sizeof(Example));
example->refcount = 1;
return example;
}
Example* Example_newWithId(long id)
{
Example* example = (Example*)(id);
__sync_fetch_and_add(&example->refcount, 1);
return example;
}
long Example_id(Example *example)
{
return (long)(example);
}
void Example_destroy(Example* example)
{
//printf("Example_destroy: %d\n", example->inputs.size());
if (NULL != example && __sync_fetch_and_add(&example->refcount, -1) == 1)
{
delete example;
example = NULL;
}
}
int Example_size(Example* example)
{
return example->inputs.size();
}
Matrix* Example_at(Example* example, int idx)
{
return example->inputs.at(idx);
}
void Example_pushback(Example* example, Matrix* m)
{
Status status;
Matrix *newm = nerv_matrix_cuda_float_create(m->nrow, m->ncol, &status);
nerv_matrix_cuda_float_copy_fromd(newm, m, 0, 0, m->nrow, &status);
//__sync_fetch_and_add(&m->refcount, 1);
return example->inputs.push_back(newm);
}
//////////////////////////////////////////////////////////////
ExamplesRepository* ExamplesRepository_new(int buffersize)
{
ExamplesRepository *repo = new ExamplesRepository; //(ExamplesRepository*)malloc(sizeof(ExamplesRepository));
repo->buffer_size_ = buffersize;
repo->full_semaphore_ = THSemaphore_new(0);
repo->empty_semaphore_ = THSemaphore_new(buffersize);
repo->examples_mutex_ = THMutex_new();
// repo->examples_ = new std::deque<Example*>();
repo->done_ = false;
repo->refcount = 1;
repo->gpuid = -1;
return repo;
}
ExamplesRepository* ExamplesRepository_newWithId(long id)
{
ExamplesRepository *repo = (ExamplesRepository*)(id);
__sync_fetch_and_add(&repo->refcount, 1);
return repo;
}
long ExamplesRepository_id(ExamplesRepository* repo)
{
return (long)(repo);
}
int ExamplesRepository_getGpuId(ExamplesRepository* repo)
{
return repo->gpuid;
}
void ExamplesRepository_setGpuId(ExamplesRepository* repo, int gpuid)
{
repo->gpuid = gpuid;
}
void ExamplesRepository_destroy(ExamplesRepository* repo)
{
if (NULL != repo && __sync_fetch_and_add(&repo->refcount, -1) == 1)
{
if (repo->full_semaphore_)
THSemaphore_free(repo->full_semaphore_);
if (repo->empty_semaphore_)
THSemaphore_free(repo->empty_semaphore_);
if (repo->examples_mutex_)
THMutex_free(repo->examples_mutex_);
delete repo;
repo = NULL;
}
}
void AcceptExample(ExamplesRepository *repo, Example *example)
{
THSemaphore_wait(repo->empty_semaphore_);
THMutex_lock(repo->examples_mutex_);
__sync_fetch_and_add(&example->refcount, 1);
repo->examples_.push_back(example);
THMutex_unlock(repo->examples_mutex_);
THSemaphore_signal(repo->full_semaphore_);
}
void ExamplesDone(ExamplesRepository *repo)
{
for (int i = 0; i < repo->buffer_size_; i++)
THSemaphore_wait(repo->empty_semaphore_);
repo->done_ = true;
THSemaphore_signal(repo->full_semaphore_);
}
Example* ProvideExample(ExamplesRepository *repo)
{
Example *ans = NULL;
THSemaphore_wait(repo->full_semaphore_);
if (repo->done_)
{
THSemaphore_signal(repo->full_semaphore_); // Increment the semaphore so
// the call by the next thread will not block.
return NULL; // no examples to return-- all finished.
}
else
{
THMutex_lock(repo->examples_mutex_);
ans = repo->examples_.front();
repo->examples_.pop_front();
THMutex_unlock(repo->examples_mutex_);
THSemaphore_signal(repo->empty_semaphore_);
}
return ans;
}
}
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