RTEMS | IMFS User allocator Plugin Code (!534)

[Bhavya Shah (@bhavyaBeliever)]

Bhavya  Shah commented on a discussion on cpukit/libfs/src/imfs/imfs_init.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/534#note_125735

 >    .fifo = &IMFS_mknod_control_enosys
 >  };
 >  
 > +void IMFS_memfile_ops_init(void){
 > +  if(!imfs_memfile_ops.allocator || !imfs_memfile_ops.deallocator || !imfs_memfile_ops.free_space){

There is for sure need that of allocator and deallocator to be either defined by user or the default should be used. If user defines it's own allocator-deallocator only user's code can tell the free space is available from the static allocated place. This get_free_space will be used during `statvfs.f_bfree`.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/534#note_125735
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