am 25f07f77: Merge changes I487ebe67,Ie7a0aeb2 (7fb0ff53) · Commits · e / os / android_system_core

libutils/FileMap.cpp

+36 −44

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@
		#include <utils/FileMap.h>
		#include <utils/Log.h>

		#include <inttypes.h>
		#include <stdio.h>
		#include <stdlib.h>

		@@ -39,24 +40,19 @@ using namespace android;

		/static/ long FileMap::mPageSize = -1;


		/*
		* Constructor. Create an empty object.
		*/
		// Constructor. Create an empty object.
		FileMap::FileMap(void)
		: mRefCount(1), mFileName(NULL), mBasePtr(NULL), mBaseLength(0),
		mDataPtr(NULL), mDataLength(0)
		{
		}

		/*
		* Destructor.
		*/
		// Destructor.
		FileMap::~FileMap(void)
		{
		assert(mRefCount == 0);

		//printf("+++ removing FileMap %p %u\n", mDataPtr, mDataLength);
		//printf("+++ removing FileMap %p %zu\n", mDataPtr, mDataLength);

		mRefCount = -100; // help catch double-free
		if (mFileName != NULL) {
		@@ -64,12 +60,12 @@ FileMap::~FileMap(void)
		}
		#ifdef HAVE_POSIX_FILEMAP
		if (mBasePtr && munmap(mBasePtr, mBaseLength) != 0) {
		ALOGD("munmap(%p, %d) failed\n", mBasePtr, (int) mBaseLength);
		ALOGD("munmap(%p, %zu) failed\n", mBasePtr, mBaseLength);
		}
		#endif
		#ifdef HAVE_WIN32_FILEMAP
		if (mBasePtr && UnmapViewOfFile(mBasePtr) == 0) {
		ALOGD("UnmapViewOfFile(%p) failed, error = %ld\n", mBasePtr,
		ALOGD("UnmapViewOfFile(%p) failed, error = %" PRId32 "\n", mBasePtr,
		GetLastError() );
		}
		if (mFileMapping != INVALID_HANDLE_VALUE) {
		@@ -80,14 +76,12 @@ FileMap::~FileMap(void)
		}


		/*
		* Create a new mapping on an open file.
		*
		* Closing the file descriptor does not unmap the pages, so we don't
		* claim ownership of the fd.
		*
		* Returns "false" on failure.
		*/
		// Create a new mapping on an open file.
		//
		// Closing the file descriptor does not unmap the pages, so we don't
		// claim ownership of the fd.
		//
		// Returns "false" on failure.
		bool FileMap::create(const char* origFileName, int fd, off64_t offset, size_t length,
		bool readOnly)
		{
		@@ -108,7 +102,7 @@ bool FileMap::create(const char* origFileName, int fd, off64_t offset, size_t le
		mFileHandle = (HANDLE) _get_osfhandle(fd);
		mFileMapping = CreateFileMapping( mFileHandle, NULL, protect, 0, 0, NULL);
		if (mFileMapping == NULL) {
		ALOGE("CreateFileMapping(%p, %lx) failed with error %ld\n",
		ALOGE("CreateFileMapping(%p, %" PRIx32 ") failed with error %" PRId32 "\n",
		mFileHandle, protect, GetLastError() );
		return false;
		}
		@@ -123,7 +117,7 @@ bool FileMap::create(const char* origFileName, int fd, off64_t offset, size_t le
		(DWORD)(adjOffset),
		adjLength );
		if (mBasePtr == NULL) {
		ALOGE("MapViewOfFile(%ld, %ld) failed with error %ld\n",
		ALOGE("MapViewOfFile(%" PRId64 ", %zu) failed with error %" PRId32 "\n",
		adjOffset, adjLength, GetLastError() );
		CloseHandle(mFileMapping);
		mFileMapping = INVALID_HANDLE_VALUE;
		@@ -142,7 +136,7 @@ bool FileMap::create(const char* origFileName, int fd, off64_t offset, size_t le
		assert(offset >= 0);
		assert(length > 0);

		/* init on first use */
		// init on first use
		if (mPageSize == -1) {
		#if NOT_USING_KLIBC
		mPageSize = sysconf(_SC_PAGESIZE);
		@@ -151,7 +145,7 @@ bool FileMap::create(const char* origFileName, int fd, off64_t offset, size_t le
		return false;
		}
		#else
		/* this holds for Linux, Darwin, Cygwin, and doesn't pain the ARM */
		// this holds for Linux, Darwin, Cygwin, and doesn't pain the ARM
		mPageSize = 4096;
		#endif
		}
		@@ -175,12 +169,12 @@ try_again:
		goto try_again;
		}

		ALOGE("mmap(%ld,%ld) failed: %s\n",
		(long) adjOffset, (long) adjLength, strerror(errno));
		ALOGE("mmap(%" PRId64 ",%zu) failed: %s\n",
		adjOffset, adjLength, strerror(errno));
		return false;
		}
		mBasePtr = ptr;
		#endif /* HAVE_POSIX_FILEMAP */
		#endif // HAVE_POSIX_FILEMAP

		mFileName = origFileName != NULL ? strdup(origFileName) : NULL;
		mBaseLength = adjLength;
		@@ -190,15 +184,13 @@ try_again:

		assert(mBasePtr != NULL);

		ALOGV("MAP: base %p/%d data %p/%d\n",
		mBasePtr, (int) mBaseLength, mDataPtr, (int) mDataLength);
		ALOGV("MAP: base %p/%zu data %p/%zu\n",
		mBasePtr, mBaseLength, mDataPtr, mDataLength);

		return true;
		}

		/*
		* Provide guidance to the system.
		*/
		// Provide guidance to the system.
		int FileMap::advise(MapAdvice advice)
		{
		#if HAVE_MADVISE