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move to read only memory mapped files

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Green Sky
2025-03-15 19:54:45 +01:00
parent f5f7f2ca9d
commit a094a3d574
5 changed files with 78 additions and 12 deletions
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26
solanaceae/ngc_ft1_sha1/backends/sha1_mapped_filesystem.cpp
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@ -68,7 +68,7 @@ void SHA1MappedFilesystem::newFromFile(std::string_view file_name, std::string_v
file_path_ = std::string(file_path)
]() mutable {
// 0. open and fail
std::unique_ptr<File2I> file_impl = construct_file2_rw_mapped(file_path_, -1);
std::unique_ptr<File2I> file_impl = construct_file2_r_mapped(file_path_);
if (!file_impl->isGood()) {
{
std::lock_guard l{ibs->info_builder_queue_mutex};
@ -124,7 +124,8 @@ void SHA1MappedFilesystem::newFromFile(std::string_view file_name, std::string_v
// executed on iterate thread
// reopen, cant move, since std::function needs to be copy consturctable (meh)
std::unique_ptr<File2I> file_impl = construct_file2_rw_mapped(file_path_, sha1_info.file_size);
std::unique_ptr<File2I> file_impl = construct_file2_r_mapped(file_path_);
//std::unique_ptr<File2I> file_impl = construct_file2_rw_mapped(file_path_, sha1_info.file_size);
if (!file_impl->isGood()) {
std::cerr << "SHA1MF error: failed opening file '" << file_path_ << "'!\n";
return;
@ -234,15 +235,22 @@ std::unique_ptr<File2I> SHA1MappedFilesystem::file2(Object ov, FILE2_FLAGS flags
return nullptr;
}
// TODO: read-only one too
// since they are mapped, is this efficent to have multiple?
auto res = construct_file2_rw_mapped(file_path, -1);
if (!res || !res->isGood()) {
std::cerr << "SHA1MF error: failed constructing mapped file '" << file_path << "'\n";
return nullptr;
if (flags & FILE2_WRITE) {
auto res = construct_file2_rw_mapped(file_path, -1);
if (!res || !res->isGood()) {
std::cerr << "SHA1MF error: failed constructing mapped RW file '" << file_path << "'\n";
return nullptr;
}
return res;
} else { // read
auto res = construct_file2_r_mapped(file_path);
if (!res || !res->isGood()) {
std::cerr << "SHA1MF error: failed constructing mapped R file '" << file_path << "'\n";
return nullptr;
}
return res;
}
return res;
}
} // Backends