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Core/Stream: Add MemoryMapped stream options (allowing for direct memory access)

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This commit is contained in:
SirLynix
2023-03-03 13:18:51 +01:00
parent 3000345eab
commit 34abeeb7bd
9 changed files with 103 additions and 72 deletions
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45
include/Nazara/Core/Stream.inl
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@@ -16,7 +16,6 @@ namespace Nz
* \param streamOptions Options for the stream
* \param openMode Reading/writing mode for the stream
*/
inline Stream::Stream(StreamOptionFlags streamOptions, OpenModeFlags openMode) :
m_bufferCapacity(0),
m_bufferOffset(0),
@@ -32,12 +31,11 @@ namespace Nz
*
* \param textMode Enables the mode or disables
*/
inline void Stream::EnableBuffering(bool buffering, std::size_t bufferSize)
{
if (buffering)
{
m_streamOptions &= ~StreamOption::Unbuffered;
m_streamOptions.Clear(StreamOption::Unbuffered);
if (m_bufferCapacity != bufferSize)
{
m_buffer = std::make_unique<UInt8[]>(bufferSize);
@@ -49,7 +47,7 @@ namespace Nz
}
else
{
m_streamOptions |= StreamOption::Unbuffered;
m_streamOptions.Set(StreamOption::Unbuffered);
m_buffer.reset();
m_bufferCapacity = 0;
}
@@ -58,9 +56,9 @@ namespace Nz
inline void Stream::EnableTextMode(bool textMode)
{
if (textMode)
m_streamOptions |= StreamOption::Text;
m_streamOptions.Set(StreamOption::Text);
else
m_streamOptions &= ~StreamOption::Text;
m_streamOptions.Clear(StreamOption::Text);
}
/*!
@@ -76,11 +74,24 @@ namespace Nz
FlushStream();
}
inline const void* Stream::GetMappedPointer() const
{
NazaraAssert(IsMemoryMapped(), "Stream is not memory-mapped");
NazaraAssert(IsReadable(), "Stream is not readable");
return GetMemoryMappedPointer();
}
inline void* Stream::GetMappedPointerMutable()
{
NazaraAssert(IsMemoryMapped(), "Stream is not memory-mapped");
NazaraAssert(IsWritable(), "Stream is not writable");
return GetMemoryMappedPointer();
}
/*!
* \brief Gets the open mode of the stream
* \return Reading/writing mode for the stream
*/
inline OpenModeFlags Stream::GetOpenMode() const
{
return m_openMode;
@@ -90,7 +101,6 @@ namespace Nz
* \brief Gets the options of the stream
* \return Options of the stream
*/
inline StreamOptionFlags Stream::GetStreamOptions() const
{
return m_streamOptions;
@@ -100,45 +110,46 @@ namespace Nz
* \brief Checks whether the stream is readable
* \return true if it is the case
*/
inline bool Stream::IsBufferingEnabled() const
{
return (m_streamOptions & StreamOption::Unbuffered) == 0;
return m_streamOptions.Test(StreamOption::Unbuffered);
}
inline bool Stream::IsMemoryMapped() const
{
return m_streamOptions.Test(StreamOption::MemoryMapped);
}
inline bool Stream::IsReadable() const
{
return (m_openMode & OpenMode::ReadOnly) != 0;
return m_openMode.Test(OpenMode::ReadOnly);
}
/*!
* \brief Checks whether the stream is sequential
* \return true if it is the case
*/
inline bool Stream::IsSequential() const
{
return (m_streamOptions & StreamOption::Sequential) != 0;
return m_streamOptions.Test(StreamOption::Sequential);
}
/*!
* \brief Checks whether the stream has text mode enabled
* \return true if it is the case
*/
inline bool Stream::IsTextModeEnabled() const
{
return (m_streamOptions & StreamOption::Text) != 0;
return m_streamOptions.Test(StreamOption::Text);
}
/*!
* \brief Checks whether the stream can be written
* \return true if it is the case
*/
inline bool Stream::IsWritable() const
{
return (m_openMode & OpenMode::WriteOnly) != 0;
return m_openMode.Test(OpenMode::WriteOnly);
}
/*!