Port CrashReportUploadThread to Windows

handler/mac/crash_report_upload_thread.h

-// Copyright 2015 The Crashpad Authors. All rights reserved.
-//
-// 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.
-
-#ifndef CRASHPAD_HANDLER_MAC_CRASH_REPORT_UPLOAD_THREAD_H_
-#define CRASHPAD_HANDLER_MAC_CRASH_REPORT_UPLOAD_THREAD_H_
-
-#include "base/basictypes.h"
-
-#include <pthread.h>
-
-#include <string>
-
-#include "client/crash_report_database.h"
-#include "util/synchronization/semaphore.h"
-
-namespace crashpad {
-
-//! \brief A thread that processes pending crash reports in a
-//!     CrashReportDatabase by uploading them or marking them as completed
-//!     without upload, as desired.
-//!
-//! A producer of crash reports should notify an object of this class that a new
-//! report has been added to the database by calling ReportPending().
-//!
-//! Independently of being triggered by ReportPending(), objects of this class
-//! periodically examine the database for pending reports. This allows failed
-//! upload attempts for reports left in the pending state to be retried. It also
-//! catches reports that are added without a ReportPending() signal being
-//! caught. This may happen if crash reports are added to the database by other
-//! processes.
-class CrashReportUploadThread {
- public:
-  //! \brief Constructs a new object.
-  //!
-  //! \param[in] database The database to upload crash reports from.
-  //! \param[in] url The URL of the server to upload crash reports to.
-  CrashReportUploadThread(CrashReportDatabase* database,
-                          const std::string& url);
-  ~CrashReportUploadThread();
-
-  //! \brief Starts a dedicated upload thread, which executes ThreadMain().
-  //!
-  //! This method may only be be called on a newly-constructed object or after
-  //! a call to Stop().
-  void Start();
-
-  //! \brief Stops the upload thread.
-  //!
-  //! The upload thread will terminate after completing whatever task it is
-  //! performing. If it is not performing any task, it will terminate
-  //! immediately. This method blocks while waiting for the upload thread to
-  //! terminate.
-  //!
-  //! This method must only be called after Start(). If Start() has been called,
-  //! this method must be called before destroying an object of this class.
-  //!
-  //! This method may be called from any thread other than the upload thread.
-  //! It is expected to only be called from the same thread that called Start().
-  void Stop();
-
-  //! \brief Informs the upload thread that a new pending report has been added
-  //!     to the database.
-  //!
-  //! This method may be called from any thread.
-  void ReportPending();
-
- private:
-  //! \brief The result code from UploadReport().
-  enum class UploadResult {
-    //! \brief The crash report was uploaded successfully.
-    kSuccess,
-
-    //! \brief The crash report upload failed in such a way that recovery is
-    //!     impossible.
-    //!
-    //! No further upload attempts should be made for the report.
-    kPermanentFailure,
-
-    //! \brief The crash report upload failed, but it might succeed again if
-    //!     retried in the future.
-    //!
-    //! If the report has not already been retried too many times, the caller
-    //! may arrange to call UploadReport() for the report again in the future,
-    //! after a suitable delay.
-    kRetry,
-  };
-
-  //! \brief Calls ProcessPendingReports() in response to ReportPending() having
-  //!     been called on any thread, as well as periodically on a timer.
-  void ThreadMain();
-
-  //! \brief Obtains all pending reports from the database, and calls
-  //!     ProcessPendingReport() to process each one.
-  void ProcessPendingReports();
-
-  //! \brief Processes a single pending report from the database.
-  //!
-  //! \param[in] report The crash report to process.
-  //!
-  //! If report upload is enabled, this method attempts to upload \a report by
-  //! calling UplaodReport(). If the upload is successful, the report will be
-  //! marked as “completed” in the database. If the upload fails and more
-  //! retries are desired, the report’s upload-attempt count and
-  //! last-upload-attempt time will be updated in the database and it will
-  //! remain in the “pending” state. If the upload fails and no more retries are
-  //! desired, or report upload is disabled, it will be marked as “completed” in
-  //! the database without ever having been uploaded.
-  void ProcessPendingReport(const CrashReportDatabase::Report& report);
-
-  //! \brief Attempts to upload a crash report.
-  //!
-  //! \param[in] report The report to upload. The caller is responsible for
-  //!     calling CrashReportDatabase::GetReportForUploading() before calling
-  //!     this method, and for calling
-  //!     CrashReportDatabase::RecordUploadAttempt() after calling this method.
-  //! \param[out] response_body If the upload attempt is successful, this will
-  //!     be set to the response body sent by the server. Breakpad-type servers
-  //!     provide the crash ID assigned by the server in the response body.
-  //!
-  //! \return A member of UploadResult indicating the result of the upload
-  //!    attempt.
-  UploadResult UploadReport(const CrashReportDatabase::Report* report,
-                            std::string* response_body);
-
-  //! \brief Cals ThreadMain().
-  //!
-  //! \param[in] arg A pointer to the object on which to invoke ThreadMain().
-  //!
-  //! \return `nullptr`.
-  static void* RunThreadMain(void* arg);
-
-  std::string url_;
-  CrashReportDatabase* database_;  // weak
-  Semaphore semaphore_;  // TODO(mark): Use a condition variable instead?
-  pthread_t thread_;
-  bool running_;
-};
-
-}  // namespace crashpad
-
-#endif  // CRASHPAD_HANDLER_MAC_CRASH_REPORT_UPLOAD_THREAD_H_