src/media/drivers/amlogic_decoder/macros.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_MEDIA_DRIVERS_AMLOGIC_DECODER_MACROS_H_
#define SRC_MEDIA_DRIVERS_AMLOGIC_DECODER_MACROS_H_

#include <assert.h>
#include <lib/ddk/debug.h>
#include <lib/syslog/global.h>
#include <zircon/syscalls.h>

#include <chrono>
#include <thread>

namespace amlogic_decoder {

// At some point we may instead wish to build libs used by this driver with an iostreams-style
// logging wrapper on top of zxlogf(), to allow logs from the driver to all go through zxlogf() and
// stay ordered that way.

// severity can be ERROR, WARNING, INFO, DEBUG, TRACE, SERIAL.
//
// Using ## __VA_ARGS__ instead of __VA_OPT__(,) __VA_ARGS__ for now, since
// __VA_OPT__ doesn't seem to be available yet.

#define LOG(severity, fmt, ...)                                                                 \
  do {                                                                                          \
    zxlogf(severity, "[%s:%s:%d] " fmt "", "amlogic-video", __func__, __LINE__, ##__VA_ARGS__); \
  } while (0)

#define DECODE_ERROR(fmt, ...) LOG(ERROR, fmt, ##__VA_ARGS__)

#define DECODE_INFO(fmt, ...) LOG(INFO, fmt, ##__VA_ARGS__)

#ifndef AMLOGIC_DLOG_ENABLE
#define AMLOGIC_DLOG_ENABLE 0
#endif

#define DLOG(fmt, ...)               \
  do {                               \
    if (AMLOGIC_DLOG_ENABLE) {       \
      LOG(INFO, fmt, ##__VA_ARGS__); \
    }                                \
  } while (0)

inline uint32_t truncate_to_32(uint64_t input) {
  assert(!(input & 0xffffffff00000000ul));
  return static_cast<uint32_t>(input);
}

// Wait for a condition to become true, with a timeout.
template <typename DurationType, typename T>
bool WaitForRegister(DurationType timeout, T condition) {
  auto start = std::chrono::high_resolution_clock::now();
  auto cast_timeout =
      std::chrono::duration_cast<std::chrono::high_resolution_clock::duration>(timeout);
  while (!condition()) {
    if (std::chrono::high_resolution_clock::now() - start >= cast_timeout) {
      return false;
    }
    std::this_thread::sleep_for(std::chrono::milliseconds(1));
  }
  return true;
}

template <typename DurationType, typename T>
__WARN_UNUSED_RESULT bool SpinWaitForRegister(DurationType timeout, T condition) {
  auto start = std::chrono::high_resolution_clock::now();
  auto cast_timeout =
      std::chrono::duration_cast<std::chrono::high_resolution_clock::duration>(timeout);
  while (!condition()) {
    if (std::chrono::high_resolution_clock::now() - start >= cast_timeout) {
      return condition();
    }
  }
  return true;
}

inline void DebugWrite(const char* log) { zx_debug_write(log, strlen(log)); }

}  // namespace amlogic_decoder

#endif  // SRC_MEDIA_DRIVERS_AMLOGIC_DECODER_MACROS_H_