lightning

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Tree: 125d63e1cc

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Author	SHA1	Message	Date
Vasil Dimov	55173a56b7	Use dedicated type for error codes Before this patch we used `int` for error codes. The problem with `int` is that we try to pass it to/from wire and the size of `int` is not defined by the standard. So a sender with 4-byte `int` would write 4 bytes to the wire and a receiver with 2-byte `int` (for example) would read just 2 bytes from the wire. To resolve this: * Introduce an error code type with a known size: `typedef s32 errcode_t`. * Change all error code macros to constants of type `errcode_t`. Constants also play better with gdb - it would visualize the name of the constant instead of the numeric value. * Change all functions that take error codes to take the new type `errcode_t` instead of `int`. * Introduce towire / fromwire functions to send / receive the newly added type `errcode_t` and use it instead of `towire_int()`. In addition: * Remove the now unneeded `towire_int()`. * Replace a hardcoded error code `-2` with a new constant `INVOICE_EXPIRED_DURING_WAIT` (903). Changelog-Changed: The waitinvoice command would now return error code 903 to designate that the invoice expired during wait, instead of the previous -2	5 years ago
Rusty Russell	b210c9d91f	lightningd: use a simple array for less memory usage. The tal overhead of 5 pointers, the linked list node is 2; and we also tal'd the string. That's 96 bytes per entry. Use a simple array instead, though it means more work on deletion since each log_entry is no longer a tal object. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>	5 years ago

Author

SHA1

Message

Date

Vasil Dimov

55173a56b7

Use dedicated type for error codes

Before this patch we used `int` for error codes. The problem with
`int` is that we try to pass it to/from wire and the size of `int` is
not defined by the standard. So a sender with 4-byte `int` would write
4 bytes to the wire and a receiver with 2-byte `int` (for example) would
read just 2 bytes from the wire.

To resolve this:

* Introduce an error code type with a known size:
  `typedef s32 errcode_t`.

* Change all error code macros to constants of type `errcode_t`.
  Constants also play better with gdb - it would visualize the name of
  the constant instead of the numeric value.

* Change all functions that take error codes to take the new type
  `errcode_t` instead of `int`.

* Introduce towire / fromwire functions to send / receive the newly added
  type `errcode_t` and use it instead of `towire_int()`.

In addition:

* Remove the now unneeded `towire_int()`.

* Replace a hardcoded error code `-2` with a new constant
  `INVOICE_EXPIRED_DURING_WAIT` (903).

Changelog-Changed: The waitinvoice command would now return error code 903 to designate that the invoice expired during wait, instead of the previous -2

5 years ago

Rusty Russell

b210c9d91f

lightningd: use a simple array for less memory usage.

The tal overhead of 5 pointers, the linked list node is 2; and we also
tal'd the string.  That's 96 bytes per entry.

Use a simple array instead, though it means more work on deletion
since each log_entry is no longer a tal object.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

5 years ago

2 Commits (125d63e1cc33d01d9c7c5195d38a919d9be4adb5)