C++ (Cpp) mono_mmap_win_prot_from_flags示例

示例#1

文件： mono-mmap-windows-uwp.c 项目： ItsVeryWindy/mono

void*
mono_file_map (size_t length, int flags, int fd, guint64 offset, void **ret_handle)
{
	void *ptr;
	int mflags = 0;
	HANDLE file, mapping;
	int prot = mono_mmap_win_prot_from_flags (flags);

	mflags = FILE_MAP_READ;
	if (flags & MONO_MMAP_WRITE)
		mflags = FILE_MAP_COPY;

	file = (HANDLE) _get_osfhandle (fd);
	mapping = CreateFileMappingFromApp (file, NULL, prot, length, NULL);

	if (mapping == NULL)
		return NULL;

	ptr = MapViewOfFileFromApp (mapping, mflags, offset, length);

	if (ptr == NULL) {
		CloseHandle (mapping);
		return NULL;
	}

	*ret_handle = (void*)mapping;
	return ptr;
}

示例#2

文件： mono-mmap-windows.c 项目： mhutch/mono

int
mono_mprotect (void *addr, size_t length, int flags)
{
	DWORD oldprot;
	int prot = mono_mmap_win_prot_from_flags (flags);

	if (flags & MONO_MMAP_DISCARD) {
		VirtualFree (addr, length, MEM_DECOMMIT);
		VirtualAlloc (addr, length, MEM_COMMIT, prot);
		return 0;
	}
	return VirtualProtect (addr, length, prot, &oldprot) == 0;
}

示例#3

文件： mono-mmap-windows.c 项目： mhutch/mono

void*
mono_valloc (void *addr, size_t length, int flags, MonoMemAccountType type)
{
	void *ptr;
	int mflags = MEM_RESERVE|MEM_COMMIT;
	int prot = mono_mmap_win_prot_from_flags (flags);
	/* translate the flags */

	if (!mono_valloc_can_alloc (length))
		return NULL;

	ptr = VirtualAlloc (addr, length, mflags, prot);

	mono_account_mem (type, (ssize_t)length);

	return ptr;
}

示例#4

文件： mono-mmap-windows.c 项目： mhutch/mono

void*
mono_valloc_aligned (size_t length, size_t alignment, int flags, MonoMemAccountType type)
{
	int prot = mono_mmap_win_prot_from_flags (flags);
	char *mem = VirtualAlloc (NULL, length + alignment, MEM_RESERVE, prot);
	char *aligned;

	if (!mem)
		return NULL;

	if (!mono_valloc_can_alloc (length))
		return NULL;

	aligned = mono_aligned_address (mem, length, alignment);

	aligned = VirtualAlloc (aligned, length, MEM_COMMIT, prot);
	g_assert (aligned);

	mono_account_mem (type, (ssize_t)length);

	return aligned;
}

示例#5

文件： mono-mmap-windows.c 项目： mhutch/mono

void*
mono_file_map (size_t length, int flags, int fd, guint64 offset, void **ret_handle)
{
	void *ptr;
	int mflags = 0;
	HANDLE file, mapping;
	int prot = mono_mmap_win_prot_from_flags (flags);
	/* translate the flags */
	/*if (flags & MONO_MMAP_PRIVATE)
		mflags |= MAP_PRIVATE;
	if (flags & MONO_MMAP_SHARED)
		mflags |= MAP_SHARED;
	if (flags & MONO_MMAP_ANON)
		mflags |= MAP_ANONYMOUS;
	if (flags & MONO_MMAP_FIXED)
		mflags |= MAP_FIXED;
	if (flags & MONO_MMAP_32BIT)
		mflags |= MAP_32BIT;*/

	mflags = FILE_MAP_READ;
	if (flags & MONO_MMAP_WRITE)
		mflags = FILE_MAP_COPY;

	file = (HANDLE) _get_osfhandle (fd);

	mapping = CreateFileMapping (file, NULL, prot, 0, 0, NULL);

	if (mapping == NULL)
		return NULL;

	ptr = MapViewOfFile (mapping, mflags, 0, offset, length);

	if (ptr == NULL) {
		CloseHandle (mapping);
		return NULL;
	}
	*ret_handle = (void*)mapping;
	return ptr;
}