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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef MOJO_EDK_EMBEDDER_PLATFORM_HANDLE_H_
      6 #define MOJO_EDK_EMBEDDER_PLATFORM_HANDLE_H_
      7 
      8 #include "build/build_config.h"
      9 #include "mojo/edk/system/system_impl_export.h"
     10 
     11 #if defined(OS_WIN)
     12 #include <windows.h>
     13 
     14 #include "base/process/process_handle.h"
     15 #elif defined(OS_MACOSX) && !defined(OS_IOS)
     16 #include <mach/mach.h>
     17 #endif
     18 
     19 namespace mojo {
     20 namespace edk {
     21 
     22 #if defined(OS_POSIX)
     23 struct MOJO_SYSTEM_IMPL_EXPORT PlatformHandle {
     24   PlatformHandle() {}
     25   explicit PlatformHandle(int handle) : handle(handle) {}
     26 #if defined(OS_MACOSX) && !defined(OS_IOS)
     27   explicit PlatformHandle(mach_port_t port)
     28       : type(Type::MACH), port(port) {}
     29 #endif
     30 
     31   void CloseIfNecessary();
     32 
     33   bool is_valid() const {
     34 #if defined(OS_MACOSX) && !defined(OS_IOS)
     35     if (type == Type::MACH || type == Type::MACH_NAME)
     36       return port != MACH_PORT_NULL;
     37 #endif
     38     return handle != -1;
     39   }
     40 
     41   enum class Type {
     42     POSIX,
     43 #if defined(OS_MACOSX) && !defined(OS_IOS)
     44     MACH,
     45     // MACH_NAME isn't a real Mach port. But rather the "name" of one that can
     46     // be resolved to a real port later. This distinction is needed so that the
     47     // "port" doesn't try to be closed if CloseIfNecessary() is called. Having
     48     // this also allows us to do checks in other places.
     49     MACH_NAME,
     50 #endif
     51   };
     52   Type type = Type::POSIX;
     53 
     54   int handle = -1;
     55 
     56 #if defined(OS_MACOSX) && !defined(OS_IOS)
     57   mach_port_t port = MACH_PORT_NULL;
     58 #endif
     59 };
     60 #elif defined(OS_WIN)
     61 struct MOJO_SYSTEM_IMPL_EXPORT PlatformHandle {
     62   PlatformHandle() : PlatformHandle(INVALID_HANDLE_VALUE) {}
     63   explicit PlatformHandle(HANDLE handle)
     64       : handle(handle), owning_process(base::GetCurrentProcessHandle()) {}
     65 
     66   void CloseIfNecessary();
     67 
     68   bool is_valid() const { return handle != INVALID_HANDLE_VALUE; }
     69 
     70   HANDLE handle;
     71 
     72   // A Windows HANDLE may be duplicated to another process but not yet sent to
     73   // that process. This tracks the handle's owning process.
     74   base::ProcessHandle owning_process;
     75 
     76   // A Windows HANDLE may be an unconnected named pipe. In this case, we need to
     77   // wait for a connection before communicating on the pipe.
     78   bool needs_connection = false;
     79 };
     80 #else
     81 #error "Platform not yet supported."
     82 #endif
     83 
     84 }  // namespace edk
     85 }  // namespace mojo
     86 
     87 #endif  // MOJO_EDK_EMBEDDER_PLATFORM_HANDLE_H_
     88