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RAM File System


TargetRFS, Blunk Microsystems’ RAM File System, includes the following features:

  • A reliable, re-entrant file system with a full POSIX- and ANSI C-compliant application program interface. Use of RAM for the backing store is invisible to the application layer.

  • Provides fast storage of temporary files.

  • Supports the POSIX "self", "group", and "other" file access protections, allowing applications to restrict some operations to privileged tasks. TargetRFS calls FsGetId(), implemented by the application, to get the running task’s user and group IDs.

  • Per task current working directories. The current working directory (CWD) is specified by two 32-bit variables. TargetRFS calls application functions to read and write the CWD state variables. If a real time operating system is used and these variables are accessed in a task specific way, each task has its own CWD.

  • Automatically calls malloc() and free() as needed when files are created, grown, or deleted. No configuration or pre-allocation of RAM memory is required.

  • Garbage collection is performed to ensure minimal use of RAM for file system control information.

  • Shipped with four sample applications: a binary search application, a shell that supports "cd", "ls", "mkdir", "pwd", etc, and two applications that test assorted file system calls. The shell may be extended with user commands.

  • Integrated with TargetOS™, Blunk Microsystems’ real-time operating system. The file system is easily ported to other real-time kernels or to polling environments that do not use a kernel.

  • Royalty-free. Includes ANSI C source code, user's manual, sample applications, and one year of technical support.