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-rw-r--r--util/mmap.cpp288
1 files changed, 144 insertions, 144 deletions
diff --git a/util/mmap.cpp b/util/mmap.cpp
index 6955d1ca96c..f034b2a3cea 100644
--- a/util/mmap.cpp
+++ b/util/mmap.cpp
@@ -1,144 +1,144 @@
-// mmap.cpp
-
-#include "stdafx.h"
-#include "mmap.h"
-
-#if defined(_WIN32)
-
-#include "windows.h"
-
-MemoryMappedFile::MemoryMappedFile() {
- fd = 0; maphandle = 0; view = 0;
-}
-
-MemoryMappedFile::~MemoryMappedFile() {
- if( view )
- UnmapViewOfFile(view);
- view = 0;
- if( maphandle )
- CloseHandle(maphandle);
- maphandle = 0;
- if( fd )
- CloseHandle(fd);
- fd = 0;
-}
-
-std::wstring toWideString(const char *s) {
- //const std::basic_string<TCHAR> s) {
- std::basic_ostringstream<TCHAR> buf;
- buf << s;
- return buf.str();
-}
-
-unsigned mapped = 0;
-
-void* MemoryMappedFile::map(const char *filename, int length) {
- std::wstring filenamew = toWideString(filename);
-
- fd = CreateFile(
- filenamew.c_str(), GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ,
- NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
- if( fd == INVALID_HANDLE_VALUE ) {
- cout << "CreateFile failed " << filename << endl;
- return 0;
- }
-
-#if defined(_WIN32)
- if( mapped > 500000000 ) {
- cout << "too much mem mapped for win32" << endl;
- if( length > 50000000 )
- length = 50000000;
- }
- mapped += length;
-#endif
-
- maphandle = CreateFileMapping(fd, NULL, PAGE_READWRITE, 0, length, NULL);
- if( maphandle == NULL ) {
- cout << "CreateFileMapping failed " << filename << endl;
- return 0;
- }
-
- view = MapViewOfFile(maphandle, FILE_MAP_ALL_ACCESS, 0, 0, 0);
- if( view == 0 )
- cout << "MapViewOfFile failed " << filename << ' ' << GetLastError() << endl;
-
- return view;
-}
-
-void MemoryMappedFile::flush(bool) {
-}
-
-#else
-
-#include <errno.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-MemoryMappedFile::MemoryMappedFile() {
- fd = 0; maphandle = 0; view = 0; len = 0;
-}
-
-MemoryMappedFile::~MemoryMappedFile() {
- if( view )
- munmap(view, len);
- view = 0;
-
- if( fd )
- close(fd);
- fd = 0;
-}
-
-#ifndef O_NOATIME
-#warning NO O_NOATIME
-#define O_NOATIME 0
-#endif
-
-void* MemoryMappedFile::map(const char *filename, int length) {
- len = length;
-
- fd = open(filename, O_CREAT | O_RDWR | O_NOATIME, S_IRUSR | S_IWUSR);
- if( !fd ) {
- cout << "couldn't open " << filename << ' ' << errno << endl;
- return 0;
- }
-
- /* make sure the file is the full desired length */
- off_t filelen = lseek(fd, 0, SEEK_END);
- if( filelen < length ) {
- cout << "map: file length=" << filelen << " want:" << length << endl;
- if( filelen != 0 ) {
- cout << " failing mapping" << endl;
- return 0;
- }
- cout << " writing file to full length with zeroes..." << endl;
- int z = 8192;
- char buf[z];
- memset(buf, 0, z);
- int left = length;
- while( 1 ) {
- if( left <= z ) {
- write(fd, buf, left);
- break;
- }
- write(fd, buf, z);
- left -= z;
- }
- cout << " done" << endl;
- }
-
- lseek(fd, length, SEEK_SET);
- write(fd, "", 1);
-
- view = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
- return view;
-}
-
-void MemoryMappedFile::flush(bool sync) {
- if( msync(view, len, sync ? MS_SYNC : MS_ASYNC) )
- cout << "msync error " << errno << endl;
-}
-
-#endif
-
+// mmap.cpp
+
+#include "stdafx.h"
+#include "mmap.h"
+
+#if defined(_WIN32)
+
+#include "windows.h"
+
+MemoryMappedFile::MemoryMappedFile() {
+ fd = 0; maphandle = 0; view = 0;
+}
+
+MemoryMappedFile::~MemoryMappedFile() {
+ if( view )
+ UnmapViewOfFile(view);
+ view = 0;
+ if( maphandle )
+ CloseHandle(maphandle);
+ maphandle = 0;
+ if( fd )
+ CloseHandle(fd);
+ fd = 0;
+}
+
+std::wstring toWideString(const char *s) {
+ //const std::basic_string<TCHAR> s) {
+ std::basic_ostringstream<TCHAR> buf;
+ buf << s;
+ return buf.str();
+}
+
+unsigned mapped = 0;
+
+void* MemoryMappedFile::map(const char *filename, int length) {
+ std::wstring filenamew = toWideString(filename);
+
+ fd = CreateFile(
+ filenamew.c_str(), GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ,
+ NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+ if( fd == INVALID_HANDLE_VALUE ) {
+ cout << "CreateFile failed " << filename << endl;
+ return 0;
+ }
+
+#if defined(_WIN32)
+ if( mapped > 500000000 ) {
+ cout << "too much mem mapped for win32" << endl;
+ if( length > 50000000 )
+ length = 50000000;
+ }
+ mapped += length;
+#endif
+
+ maphandle = CreateFileMapping(fd, NULL, PAGE_READWRITE, 0, length, NULL);
+ if( maphandle == NULL ) {
+ cout << "CreateFileMapping failed " << filename << endl;
+ return 0;
+ }
+
+ view = MapViewOfFile(maphandle, FILE_MAP_ALL_ACCESS, 0, 0, 0);
+ if( view == 0 )
+ cout << "MapViewOfFile failed " << filename << ' ' << GetLastError() << endl;
+
+ return view;
+}
+
+void MemoryMappedFile::flush(bool) {
+}
+
+#else
+
+#include <errno.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+MemoryMappedFile::MemoryMappedFile() {
+ fd = 0; maphandle = 0; view = 0; len = 0;
+}
+
+MemoryMappedFile::~MemoryMappedFile() {
+ if( view )
+ munmap(view, len);
+ view = 0;
+
+ if( fd )
+ close(fd);
+ fd = 0;
+}
+
+#ifndef O_NOATIME
+#warning NO O_NOATIME
+#define O_NOATIME 0
+#endif
+
+void* MemoryMappedFile::map(const char *filename, int length) {
+ len = length;
+
+ fd = open(filename, O_CREAT | O_RDWR | O_NOATIME, S_IRUSR | S_IWUSR);
+ if( !fd ) {
+ cout << "couldn't open " << filename << ' ' << errno << endl;
+ return 0;
+ }
+
+ /* make sure the file is the full desired length */
+ off_t filelen = lseek(fd, 0, SEEK_END);
+ if( filelen < length ) {
+ cout << "map: file length=" << filelen << " want:" << length << endl;
+ if( filelen != 0 ) {
+ cout << " failing mapping" << endl;
+ return 0;
+ }
+ cout << " writing file to full length with zeroes..." << endl;
+ int z = 8192;
+ char buf[z];
+ memset(buf, 0, z);
+ int left = length;
+ while( 1 ) {
+ if( left <= z ) {
+ write(fd, buf, left);
+ break;
+ }
+ write(fd, buf, z);
+ left -= z;
+ }
+ cout << " done" << endl;
+ }
+
+ lseek(fd, length, SEEK_SET);
+ write(fd, "", 1);
+
+ view = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ return view;
+}
+
+void MemoryMappedFile::flush(bool sync) {
+ if( msync(view, len, sync ? MS_SYNC : MS_ASYNC) )
+ cout << "msync error " << errno << endl;
+}
+
+#endif
+
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