intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 64 insertions, 0 deletions

diff --git a/library/cpp/deprecated/mapped_file/mapped_file.cpp b/library/cpp/deprecated/mapped_file/mapped_file.cpp
new file mode 100644
index 0000000000..b0e4511299
--- /dev/null
+++ b/library/cpp/deprecated/mapped_file/mapped_file.cpp
@@ -0,0 +1,64 @@
+#include "mapped_file.h"
+
+#include <util/generic/yexception.h>
+#include <util/system/defaults.h>
+#include <util/system/hi_lo.h>
+#include <util/system/filemap.h>
+
+TMappedFile::TMappedFile(TFileMap* map, const char* dbgName) {
+    Map_ = map;
+    i64 len = Map_->Length();
+    if (Hi32(len) != 0 && sizeof(size_t) <= sizeof(ui32))
+        ythrow yexception() << "File '" << dbgName << "' mapping error: " << len << " too large";
+
+    Map_->Map(0, static_cast<size_t>(len));
+}
+
+TMappedFile::TMappedFile(const TFile& file, TFileMap::EOpenMode om, const char* dbgName)
+    : Map_(nullptr)
+{
+    init(file, om, dbgName);
+}
+
+void TMappedFile::precharge(size_t off, size_t size) const {
+    if (!Map_)
+        return;
+
+    Map_->Precharge(off, size);
+}
+
+void TMappedFile::init(const TString& name) {
+    THolder<TFileMap> map(new TFileMap(name));
+    TMappedFile newFile(map.Get(), name.data());
+    Y_UNUSED(map.Release());
+    newFile.swap(*this);
+    newFile.term();
+}
+
+void TMappedFile::init(const TString& name, size_t length, TFileMap::EOpenMode om) {
+    THolder<TFileMap> map(new TFileMap(name, length, om));
+    TMappedFile newFile(map.Get(), name.data());
+    Y_UNUSED(map.Release());
+    newFile.swap(*this);
+    newFile.term();
+}
+
+void TMappedFile::init(const TFile& file, TFileMap::EOpenMode om, const char* dbgName) {
+    THolder<TFileMap> map(new TFileMap(file, om));
+    TMappedFile newFile(map.Get(), dbgName);
+    Y_UNUSED(map.Release());
+    newFile.swap(*this);
+    newFile.term();
+}
+
+void TMappedFile::init(const TString& name, TFileMap::EOpenMode om) {
+    THolder<TFileMap> map(new TFileMap(name, om));
+    TMappedFile newFile(map.Get(), name.data());
+    Y_UNUSED(map.Release());
+    newFile.swap(*this);
+    newFile.term();
+}
+
+void TMappedFile::flush() {
+    Map_->Flush();
+}