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hle_ipc: Add helper functions for reading and writing buffers.

This commit is contained in:
bunnei 2018-02-13 21:41:20 -05:00
parent 4f8ee5e456
commit 1ce6fff064
3 changed files with 55 additions and 0 deletions

View file

@ -91,6 +91,10 @@ struct BufferDescriptorX {
address |= static_cast<VAddr>(address_bits_36_38) << 36;
return address;
}
u64 Size() const {
return static_cast<u64>(size);
}
};
static_assert(sizeof(BufferDescriptorX) == 8, "BufferDescriptorX size is incorrect");

View file

@ -12,6 +12,7 @@
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/server_session.h"
#include "core/memory.h"
namespace Kernel {
@ -210,4 +211,42 @@ ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(u32_le* dst_cmdbuf, P
return RESULT_SUCCESS;
}
std::vector<u8> HLERequestContext::ReadBuffer() const {
std::vector<u8> buffer;
const bool is_buffer_a{BufferDescriptorA().size() && BufferDescriptorA()[0].Size()};
if (is_buffer_a) {
buffer.resize(BufferDescriptorA()[0].Size());
Memory::ReadBlock(BufferDescriptorA()[0].Address(), buffer.data(), buffer.size());
} else {
buffer.resize(BufferDescriptorX()[0].Size());
Memory::ReadBlock(BufferDescriptorX()[0].Address(), buffer.data(), buffer.size());
}
return buffer;
}
size_t HLERequestContext::WriteBuffer(const void* buffer, const size_t size) const {
const bool is_buffer_b{BufferDescriptorB().size() && BufferDescriptorB()[0].Size()};
if (is_buffer_b) {
const size_t size{std::min(BufferDescriptorB()[0].Size(), size)};
Memory::WriteBlock(BufferDescriptorB()[0].Address(), buffer, size);
return size;
} else {
const size_t size{std::min(BufferDescriptorC()[0].Size(), size)};
Memory::WriteBlock(BufferDescriptorC()[0].Address(), buffer, size);
return size;
}
}
size_t HLERequestContext::WriteBuffer(const std::vector<u8>& buffer) const {
return WriteBuffer(buffer.data(), buffer.size());
}
size_t HLERequestContext::GetWriteBufferSize() const {
const bool is_buffer_b{BufferDescriptorB().size() && BufferDescriptorB()[0].Size()};
return is_buffer_b ? BufferDescriptorB()[0].Size() : BufferDescriptorC()[0].Size();
}
} // namespace Kernel

View file

@ -143,6 +143,18 @@ public:
return domain_message_header;
}
/// Helper function to read a buffer using the appropriate buffer descriptor
std::vector<u8> ReadBuffer() const;
/// Helper function to write a buffer using the appropriate buffer descriptor
size_t WriteBuffer(const void* buffer, const size_t size) const;
/// Helper function to write a buffer using the appropriate buffer descriptor
size_t WriteBuffer(const std::vector<u8>& buffer) const;
/// Helper function to get the size of the output buffer
size_t GetWriteBufferSize() const;
template <typename T>
SharedPtr<T> GetCopyObject(size_t index) {
ASSERT(index < copy_objects.size());