Enum xz_embedded_sys::xz_mode
[−]
[src]
pub enum xz_mode {
XZ_SINGLE,
XZ_PREALLOC,
XZ_DYNALLOC,
}Operation mode
It is possible to enable support only for a subset of the above modes at compile time by defining XZ_DEC_SINGLE, XZ_DEC_PREALLOC, or XZ_DEC_DYNALLOC. The xz_dec kernel module is always compiled with support for all operation modes, but the preboot code may be built with fewer features to minimize code size.
Variants
XZ_SINGLE | Single-call mode. This uses less RAM than than multi-call modes, because the LZMA2 dictionary doesn't need to be allocated as part of the decoder state. All required data structures are allocated at initialization, so xz_dec_run() cannot return XZ_MEM_ERROR. |
XZ_PREALLOC | Multi-call mode with preallocated LZMA2 dictionary buffer. All data structures are allocated at initialization, so xz_dec_run() cannot return XZ_MEM_ERROR. |
XZ_DYNALLOC | Multi-call mode. The LZMA2 dictionary is allocated once the required size has been parsed from the stream headers. If the allocation fails, xz_dec_run() will return XZ_MEM_ERROR. |