Panda3D
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Simulates an actual directory on disk with in-memory storage. More...
#include "virtualFileMountRamdisk.h"
Public Member Functions | |
virtual bool | atomic_compare_and_exchange_contents (const Filename &file, string &orig_contents, const string &old_contents, const string &new_contents) |
See Filename::atomic_compare_and_exchange_contents(). More... | |
virtual bool | atomic_read_contents (const Filename &file, string &contents) const |
See Filename::atomic_read_contents(). More... | |
virtual bool | copy_file (const Filename &orig_filename, const Filename &new_filename) |
Attempts to copy the contents of the indicated file to the indicated file. More... | |
virtual bool | create_file (const Filename &file) |
Attempts to create the indicated file within the mount, if it does not already exist. More... | |
virtual bool | delete_file (const Filename &file) |
Attempts to delete the indicated file or directory within the mount. More... | |
virtual TypeHandle | force_init_type () |
virtual streamsize | get_file_size (const Filename &file, istream *stream) const |
Returns the current size on disk (or wherever it is) of the already-open file. More... | |
virtual streamsize | get_file_size (const Filename &file) const |
Returns the current size on disk (or wherever it is) of the file before it has been opened. More... | |
virtual time_t | get_timestamp (const Filename &file) const |
Returns a time_t value that represents the time the file was last modified, to within whatever precision the operating system records this information (on a Windows95 system, for instance, this may only be accurate to within 2 seconds). More... | |
virtual TypeHandle | get_type () const |
virtual bool | has_file (const Filename &file) const |
Returns true if the indicated file exists within the mount system. More... | |
virtual bool | is_directory (const Filename &file) const |
Returns true if the indicated file exists within the mount system and is a directory. More... | |
virtual bool | is_regular_file (const Filename &file) const |
Returns true if the indicated file exists within the mount system and is a regular file. More... | |
virtual bool | is_writable (const Filename &file) const |
Returns true if the named file or directory may be written to, false otherwise. More... | |
virtual bool | make_directory (const Filename &file) |
Attempts to create the indicated file within the mount, if it does not already exist. More... | |
virtual ostream * | open_append_file (const Filename &file) |
Works like open_write_file(), but the file is opened in append mode. More... | |
virtual iostream * | open_read_append_file (const Filename &file) |
Works like open_read_write_file(), but the file is opened in append mode. More... | |
virtual istream * | open_read_file (const Filename &file) const |
Opens the file for reading, if it exists. More... | |
virtual iostream * | open_read_write_file (const Filename &file, bool truncate) |
Opens the file for writing. More... | |
virtual ostream * | open_write_file (const Filename &file, bool truncate) |
Opens the file for writing. More... | |
virtual void | output (ostream &out) const |
virtual bool | rename_file (const Filename &orig_filename, const Filename &new_filename) |
Attempts to rename the contents of the indicated file to the indicated file. More... | |
virtual bool | scan_directory (vector_string &contents, const Filename &dir) const |
Fills the given vector up with the list of filenames that are local to this directory, if the filename is a directory. More... | |
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virtual void | close_read_file (istream *stream) const |
Closes a file opened by a previous call to open_read_file(). More... | |
virtual void | close_read_write_file (iostream *stream) |
Closes a file opened by a previous call to open_read_write_file(). More... | |
virtual void | close_write_file (ostream *stream) |
Closes a file opened by a previous call to open_write_file(). More... | |
VirtualFileSystem * | get_file_system () const |
Returns the file system this mount object is attached to. More... | |
int | get_mount_flags () const |
Returns the set of flags passed by the user to the VirtualFileSystem::mount() command. More... | |
const Filename & | get_mount_point () const |
Returns the name of the directory within the virtual file system that this mount object is attached to. More... | |
virtual bool | get_system_info (const Filename &file, SubfileInfo &info) |
Populates the SubfileInfo structure with the data representing where the file actually resides on disk, if this is knowable. More... | |
virtual PointerTo< VirtualFile > | make_virtual_file (const Filename &local_filename, const Filename &original_filename, bool implicit_pz_file, int open_flags) |
Constructs and returns a new VirtualFile instance that corresponds to the indicated filename within this mount point. More... | |
istream * | open_read_file (const Filename &file, bool do_uncompress) const |
Opens the file for reading. More... | |
ostream * | open_write_file (const Filename &file, bool do_compress, bool truncate) |
Opens the file for writing. More... | |
virtual bool | read_file (const Filename &file, bool do_uncompress, pvector< unsigned char > &result) const |
Fills up the indicated pvector with the contents of the file, if it is a regular file. More... | |
virtual void | write (ostream &out) const |
virtual bool | write_file (const Filename &file, bool do_compress, const unsigned char *data, size_t data_size) |
Writes the indicated data to the file, if it is a writable file. More... | |
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TypedReferenceCount (const TypedReferenceCount ©) | |
void | operator= (const TypedReferenceCount ©) |
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TypedObject (const TypedObject ©) | |
TypedObject * | as_typed_object () |
Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
const TypedObject * | as_typed_object () const |
Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
int | get_best_parent_from_Set (const std::set< int > &) const |
int | get_type_index () const |
Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. More... | |
bool | is_exact_type (TypeHandle handle) const |
Returns true if the current object is the indicated type exactly. More... | |
bool | is_of_type (TypeHandle handle) const |
Returns true if the current object is or derives from the indicated type. More... | |
void | operator= (const TypedObject ©) |
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int | get_ref_count () const |
Returns the current reference count. More... | |
WeakReferenceList * | get_weak_list () const |
Returns the WeakReferenceList associated with this ReferenceCount object. More... | |
bool | has_weak_list () const |
Returns true if this particular ReferenceCount object has a WeakReferenceList created, false otherwise. More... | |
void | local_object () |
This function should be called, once, immediately after creating a new instance of some ReferenceCount-derived object on the stack. More... | |
void | ref () const |
Explicitly increments the reference count. More... | |
bool | test_ref_count_integrity () const |
Does some easy checks to make sure that the reference count isn't completely bogus. More... | |
bool | test_ref_count_nonzero () const |
Does some easy checks to make sure that the reference count isn't zero, or completely bogus. More... | |
virtual bool | unref () const |
Explicitly decrements the reference count. More... | |
void | weak_ref (WeakPointerToVoid *ptv) |
Adds the indicated PointerToVoid as a weak reference to this object. More... | |
void | weak_unref (WeakPointerToVoid *ptv) |
Removes the indicated PointerToVoid as a weak reference to this object. More... | |
Static Public Member Functions | |
static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
This function is declared non-inline to work around a compiler bug in g++ 2.96. More... | |
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static TypeHandle | get_class_type () |
static void | init_type () |
Simulates an actual directory on disk with in-memory storage.
This is useful mainly for performing high level functions that expect disk I/O without actually writing files to disk. Naturally, there are significant limits to the size of the files that may be written with this system; and "files" written here are not automatically persistent between sessions.
Definition at line 34 of file virtualFileMountRamdisk.h.
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virtual |
See Filename::atomic_compare_and_exchange_contents().
Reimplemented from VirtualFileMount.
Definition at line 443 of file virtualFileMountRamdisk.cxx.
References atomic_read_contents().
Referenced by scan_directory().
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virtual |
See Filename::atomic_read_contents().
Reimplemented from VirtualFileMount.
Definition at line 472 of file virtualFileMountRamdisk.cxx.
Referenced by atomic_compare_and_exchange_contents().
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virtual |
Attempts to copy the contents of the indicated file to the indicated file.
Both filenames will be within the mount. Returns true on success, false on failure. If this returns false, the copy will be performed by explicit read-and-write operations.
Reimplemented from VirtualFileMount.
Definition at line 148 of file virtualFileMountRamdisk.cxx.
References make_directory().
Referenced by rename_file().
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virtual |
Attempts to create the indicated file within the mount, if it does not already exist.
Returns true on success (or if the file already exists), or false if it cannot be created.
Reimplemented from VirtualFileMount.
Definition at line 56 of file virtualFileMountRamdisk.cxx.
References delete_file().
Referenced by has_file().
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virtual |
Attempts to delete the indicated file or directory within the mount.
This can remove a single file or an empty directory. It will not remove a nonempty directory. Returns true on success, false on failure.
Reimplemented from VirtualFileMount.
Definition at line 73 of file virtualFileMountRamdisk.cxx.
References rename_file().
Referenced by create_file().
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virtual |
Returns the current size on disk (or wherever it is) of the already-open file.
Pass in the stream that was returned by open_read_file(); some implementations may require this stream to determine the size.
Implements VirtualFileMount.
Definition at line 355 of file virtualFileMountRamdisk.cxx.
Referenced by open_read_append_file().
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virtual |
Returns the current size on disk (or wherever it is) of the file before it has been opened.
Implements VirtualFileMount.
Definition at line 374 of file virtualFileMountRamdisk.cxx.
References get_timestamp().
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virtual |
Returns a time_t value that represents the time the file was last modified, to within whatever precision the operating system records this information (on a Windows95 system, for instance, this may only be accurate to within 2 seconds).
If the timestamp cannot be determined, either because it is not supported by the operating system or because there is some error (such as file not found), returns 0.
Implements VirtualFileMount.
Definition at line 401 of file virtualFileMountRamdisk.cxx.
References scan_directory().
Referenced by get_file_size().
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virtual |
Returns true if the indicated file exists within the mount system.
Implements VirtualFileMount.
Definition at line 40 of file virtualFileMountRamdisk.cxx.
References create_file().
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virtual |
Returns true if the indicated file exists within the mount system and is a directory.
Implements VirtualFileMount.
Definition at line 199 of file virtualFileMountRamdisk.cxx.
References is_regular_file().
Referenced by make_directory().
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virtual |
Returns true if the indicated file exists within the mount system and is a regular file.
Implements VirtualFileMount.
Definition at line 213 of file virtualFileMountRamdisk.cxx.
References is_writable().
Referenced by is_directory().
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virtual |
Returns true if the named file or directory may be written to, false otherwise.
Reimplemented from VirtualFileMount.
Definition at line 227 of file virtualFileMountRamdisk.cxx.
References VirtualFileMountMultifile::has_file(), and open_read_file().
Referenced by is_regular_file().
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Attempts to create the indicated file within the mount, if it does not already exist.
Returns true on success, or false if it cannot be created. If the directory already existed prior to this call, may return either true or false.
Reimplemented from VirtualFileMount.
Definition at line 185 of file virtualFileMountRamdisk.cxx.
References is_directory().
Referenced by copy_file().
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Works like open_write_file(), but the file is opened in append mode.
Like open_write_file, the returned pointer should eventually be passed to close_write_file().
Reimplemented from VirtualFileMount.
Definition at line 287 of file virtualFileMountRamdisk.cxx.
References open_read_write_file().
Referenced by open_write_file().
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virtual |
Works like open_read_write_file(), but the file is opened in append mode.
Like open_read_write_file, the returned pointer should eventually be passed to close_read_write_file().
Reimplemented from VirtualFileMount.
Definition at line 333 of file virtualFileMountRamdisk.cxx.
References get_file_size().
Referenced by open_read_write_file().
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Opens the file for reading, if it exists.
Returns a newly allocated istream on success (which you should eventually delete when you are done reading). Returns NULL on failure.
Implements VirtualFileMount.
Definition at line 240 of file virtualFileMountRamdisk.cxx.
References open_write_file().
Referenced by is_writable().
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Opens the file for writing.
Returns a newly allocated iostream on success (which you should eventually delete when you are done writing). Returns NULL on failure.
Reimplemented from VirtualFileMount.
Definition at line 307 of file virtualFileMountRamdisk.cxx.
References open_read_append_file().
Referenced by open_append_file().
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virtual |
Opens the file for writing.
Returns a newly allocated ostream on success (which you should eventually delete when you are done writing). Returns NULL on failure.
Reimplemented from VirtualFileMount.
Definition at line 261 of file virtualFileMountRamdisk.cxx.
References open_append_file().
Referenced by open_read_file().
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Attempts to rename the contents of the indicated file to the indicated file.
Both filenames will be within the mount. Returns true on success, false on failure. If this returns false, this will be attempted again with a copy-and-delete operation.
Reimplemented from VirtualFileMount.
Definition at line 90 of file virtualFileMountRamdisk.cxx.
References copy_file().
Referenced by delete_file().
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virtual |
Fills the given vector up with the list of filenames that are local to this directory, if the filename is a directory.
Returns true if successful, or false if the file is not a directory or cannot be read.
Implements VirtualFileMount.
Definition at line 422 of file virtualFileMountRamdisk.cxx.
References atomic_compare_and_exchange_contents().
Referenced by get_timestamp().