| Copyright | (c) Jost Berthold 2010-2015 |
|---|---|
| License | BSD3 |
| Maintainer | jost.berthold@gmail.com |
| Stability | experimental |
| Portability | no (depends on GHC internals) |
| Safe Haskell | None |
| Language | Haskell2010 |
GHC.Packing.PackException
Description
Exception type for packman library, using magic constants #include'd from a C header file shared with the foreign primitive operation code.
PackExceptions can occur at Haskell level or in the foreign primop.
All Haskell-level exceptions are cases of invalid data when reading
and deserialising Serialised data:
P_BinaryMismatch: serialised data were produced by a different executable (must be the same binary).P_TypeMismatch: serialised data have the wrong typeP_ParseError: serialised data could not be parsed (from binary or text format)
The exceptions caused by the foreign primops (return codes)
indicate errors at the C level. Most of them can occur when
serialising data; the exception is P_GARBLED which indicates that
serialised data is garbled.
Documentation
data PackException Source #
Packing exception codes, matching error codes implemented in the runtime system or describing errors which can occur within Haskell.
Constructors
| P_SUCCESS | no error, ==0. Internal code, should never be seen by users. |
| P_BLACKHOLE | RTS: packing hit a blackhole. Used internally, not passed to users. |
| P_NOBUFFER | RTS: buffer too small |
| P_CANNOTPACK | RTS: contains closure which cannot be packed (MVar, TVar) |
| P_UNSUPPORTED | RTS: contains unsupported closure type (implementation missing) |
| P_IMPOSSIBLE | RTS: impossible case (stack frame, message,...RTS bug!) |
| P_GARBLED | RTS: corrupted data for deserialisation |
| P_ParseError | Haskell: Packet data could not be parsed |
| P_BinaryMismatch | Haskell: Executable binaries do not match |
| P_TypeMismatch | Haskell: Packet data encodes unexpected type |
Instances
decodeEx :: Int# -> PackException Source #
decodes an Int# to a PackException