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#ifndef MBGL_UTIL_UV_DETAIL
#define MBGL_UTIL_UV_DETAIL
#include <mbgl/util/uv-worker.h>
#include <mbgl/util/noncopyable.hpp>
#include <uv.h>
#include <functional>
#include <cassert>
#include <memory>
#include <string>
namespace uv {
template <class T>
void close(std::unique_ptr<T> ptr) {
uv_close(reinterpret_cast<uv_handle_t*>(ptr.release()), [](uv_handle_t* handle) {
delete reinterpret_cast<T*>(handle);
});
}
class loop : public mbgl::util::noncopyable {
public:
inline loop() {
#if UV_VERSION_MAJOR == 0 && UV_VERSION_MINOR <= 10
l = uv_loop_new();
if (l == nullptr) {
#else
l = new uv_loop_t;
if (uv_loop_init(l) != 0) {
#endif
throw std::runtime_error("failed to initialize loop");
}
}
inline ~loop() {
#if UV_VERSION_MAJOR == 0 && UV_VERSION_MINOR <= 10
uv_loop_delete(l);
#else
uv_loop_close(l);
delete l;
#endif
}
inline uv_loop_t *operator*() { return l; }
private:
uv_loop_t *l = nullptr;
};
class async : public mbgl::util::noncopyable {
public:
inline async(uv_loop_t* loop, std::function<void ()> fn_)
: a(new uv_async_t)
, fn(fn_)
{
a->data = this;
if (uv_async_init(loop, a.get(), async_cb) != 0) {
throw std::runtime_error("failed to initialize async");
}
}
inline ~async() {
close(std::move(a));
}
inline void send() {
if (uv_async_send(a.get()) != 0) {
throw std::runtime_error("failed to async send");
}
}
private:
#if UV_VERSION_MAJOR == 0 && UV_VERSION_MINOR <= 10
static void async_cb(uv_async_t* a, int) {
#else
static void async_cb(uv_async_t* a) {
#endif
reinterpret_cast<async*>(a->data)->fn();
}
std::unique_ptr<uv_async_t> a;
std::function<void ()> fn;
};
class rwlock : public mbgl::util::noncopyable {
public:
inline rwlock() {
if (uv_rwlock_init(&mtx) != 0) {
throw std::runtime_error("failed to initialize read-write lock");
}
}
inline ~rwlock() { uv_rwlock_destroy(&mtx); }
inline void rdlock() { uv_rwlock_rdlock(&mtx); }
inline void wrlock() { uv_rwlock_wrlock(&mtx); }
inline void rdunlock() { uv_rwlock_rdunlock(&mtx); }
inline void wrunlock() { uv_rwlock_wrunlock(&mtx); }
private:
uv_rwlock_t mtx;
};
class readlock : public mbgl::util::noncopyable {
public:
inline readlock(rwlock &mtx_) : mtx(mtx_) { mtx.rdlock(); }
inline readlock(const std::unique_ptr<rwlock> &mtx_) : mtx(*mtx_) { mtx.rdlock(); }
inline ~readlock() { mtx.rdunlock(); }
private:
rwlock &mtx;
};
class writelock : public mbgl::util::noncopyable {
public:
inline writelock(rwlock &mtx_) : mtx(mtx_) { mtx.wrlock(); }
inline writelock(const std::unique_ptr<rwlock> &mtx_) : mtx(*mtx_) { mtx.wrlock(); }
inline ~writelock() { mtx.wrunlock(); }
private:
rwlock &mtx;
};
class worker : public mbgl::util::noncopyable {
public:
inline worker(uv_loop_t *loop, unsigned int count, const char *name = nullptr) : w(new uv_worker_t) {
uv_worker_init(w, loop, count, name);
}
inline ~worker() {
uv_worker_close(w, [](uv_worker_t *worker_) {
delete worker_;
});
}
inline void add(void *data, uv_worker_cb work_cb, uv_worker_after_cb after_work_cb) {
uv_worker_send(w, data, work_cb, after_work_cb);
}
private:
uv_worker_t *w;
};
template <typename T>
class work : public mbgl::util::noncopyable {
public:
typedef std::function<void (T&)> work_callback;
typedef std::function<void (T&)> after_work_callback;
template<typename... Args>
work(worker &worker, work_callback work_cb_, after_work_callback after_work_cb_, Args&&... args)
: data(std::forward<Args>(args)...),
work_cb(work_cb_),
after_work_cb(after_work_cb_) {
worker.add(this, do_work, after_work);
}
private:
static void do_work(void *data) {
work<T> *w = reinterpret_cast<work<T> *>(data);
w->work_cb(w->data);
}
static void after_work(void *data) {
work<T> *w = reinterpret_cast<work<T> *>(data);
w->after_work_cb(w->data);
delete w;
}
private:
T data;
work_callback work_cb;
after_work_callback after_work_cb;
};
}
#endif
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