flutter_runner::FileInNamespaceBuffer Class Reference

A mapping to a buffer for a file that has been loaded into a namespace. More...

#include <file_in_namespace_buffer.h>

Inheritance diagram for flutter_runner::FileInNamespaceBuffer:

Public Member Functions
	FileInNamespaceBuffer (int namespace_fd, const char *path, bool executable)
	~FileInNamespaceBuffer ()
const uint8_t *	GetMapping () const override
size_t	GetSize () const override
bool	IsDontNeedSafe () const override
Public Member Functions inherited from fml::Mapping
	Mapping ()
virtual	~Mapping ()

Detailed Description

A mapping to a buffer for a file that has been loaded into a namespace.

Definition at line 12 of file file_in_namespace_buffer.h.

Constructor & Destructor Documentation

FileInNamespaceBuffer()

flutter_runner::FileInNamespaceBuffer::FileInNamespaceBuffer	(	int	namespace_fd,
		const char *	path,
		bool	executable
	)

Loads the file at |path| into the namespace |namespace_fd|, creating a mapping to the loaded buffer.

The file will be loaded with the readable permission. If |executable| is true, the file will also be loaded with the executable permission.

Definition at line 20 of file file_in_namespace_buffer.cc.

    : address_(nullptr), size_(0) {
  fuchsia::mem::Buffer buffer;
  if (!dart_utils::VmoFromFilenameAt(namespace_fd, path, executable, &buffer) ||
      buffer.size == 0) {
    return;
  }
 
  uint32_t flags = ZX_VM_PERM_READ;
  if (executable) {
    flags |= ZX_VM_PERM_EXECUTE;
  }
 
  uintptr_t addr;
  const zx_status_t status =
      zx::vmar::root_self()->map(flags, 0, buffer.vmo, 0, buffer.size, &addr);
  if (status != ZX_OK) {
    FML_LOG(FATAL) << "Failed to map " << path << ": "
                   << zx_status_get_string(status);
  }
 
  address_ = reinterpret_cast<void*>(addr);
  size_ = buffer.size;
}

~FileInNamespaceBuffer()

flutter_runner::FileInNamespaceBuffer::~FileInNamespaceBuffer

(

)

Definition at line 47 of file file_in_namespace_buffer.cc.

                                              {
  if (address_ != nullptr) {
    zx::vmar::root_self()->unmap(reinterpret_cast<uintptr_t>(address_), size_);
    address_ = nullptr;
    size_ = 0;
  }
}

Member Function Documentation

GetMapping()

const uint8_t * flutter_runner::FileInNamespaceBuffer::GetMapping ( ) const

overridevirtual

Implements fml::Mapping.

Definition at line 55 of file file_in_namespace_buffer.cc.

                                                       {
  return reinterpret_cast<const uint8_t*>(address_);
}

GetSize()

size_t flutter_runner::FileInNamespaceBuffer::GetSize ( ) const

overridevirtual

Implements fml::Mapping.

Definition at line 59 of file file_in_namespace_buffer.cc.

                                            {
  return size_;
}

IsDontNeedSafe()

bool flutter_runner::FileInNamespaceBuffer::IsDontNeedSafe ( ) const

overridevirtual

Implements fml::Mapping.

Definition at line 63 of file file_in_namespace_buffer.cc.

                                                 {
  return true;
}

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The documentation for this class was generated from the following files:

• shell/platform/fuchsia/flutter/file_in_namespace_buffer.h
• shell/platform/fuchsia/flutter/file_in_namespace_buffer.cc