diff options
Diffstat (limited to 'dev/kernel/src/Swap/DiskSwap.cc')
| -rw-r--r-- | dev/kernel/src/Swap/DiskSwap.cc | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/dev/kernel/src/Swap/DiskSwap.cc b/dev/kernel/src/Swap/DiskSwap.cc new file mode 100644 index 00000000..c50a96a9 --- /dev/null +++ b/dev/kernel/src/Swap/DiskSwap.cc @@ -0,0 +1,67 @@ +/* ------------------------------------------- + + Copyright (C) 2024-2025 Amlal EL Mahrouss Labs, all rights reserved. + +------------------------------------------- */ + +#include <SwapKit/DiskSwap.h> +#include <KernelKit/FileMgr.h> + +namespace NeOS +{ + /***********************************************************************************/ + /// @brief Write memory chunk onto disk. + /// @param fork_name The swap name to recognize this memory region. + /// @param fork_name_len length of fork name. + /// @param data the data packet. + /// @return Whether the swap was written to disk, or not. + /***********************************************************************************/ + BOOL SwapDiskInterface::Write(const Char* fork_name, const SizeT fork_name_len, SWAP_DISK_HEADER* data) + { + if (!fork_name || !fork_name_len) + return NO; + + if (*fork_name == 0) + return NO; + + if (!data) + return NO; + + FileStream file(kSwapPageFile, "wb"); + + auto ret = file.Write(fork_name, data, sizeof(SWAP_DISK_HEADER) + data->fBlobSz); + + if (ret.Error()) + return NO; + + return YES; + } + + /***********************************************************************************/ + /// @brief Read memory chunk from disk. + /// @param fork_name The swap name to recognize this memory region. + /// @param fork_name_len length of fork name. + /// @param data the data packet length. + /// @return Whether the swap was fetched to disk, or not. + /***********************************************************************************/ + SWAP_DISK_HEADER* SwapDiskInterface::Read(const Char* fork_name, const SizeT fork_name_len, const SizeT data_len) + { + if (!fork_name || !fork_name_len) + return nullptr; + + if (*fork_name == 0) + return nullptr; + + if (data_len > kSwapBlockMaxSize) + return nullptr; + + if (data_len == 0) + return nullptr; + + FileStream file(kSwapPageFile, "rb"); + + VoidPtr blob = file.Read(fork_name, sizeof(SWAP_DISK_HEADER) + data_len); + + return reinterpret_cast<SWAP_DISK_HEADER*>(blob); + } +} // namespace NeOS |
