mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
cremno
158 lines
5.1 KiB
Markdown
158 lines
5.1 KiB
Markdown
# mruby configuration macros.
|
|
|
|
## How to use these macros.
|
|
You can use mrbconfs with following ways:
|
|
* Write them in `mrbconf.h`.
|
|
* Using compiler flags is preferred when building a cross binaries or multiple mruby binaries
|
|
since it's easier to use different mrbconf per each `MRuby::Build`.
|
|
* Most flags can be enabled by just commenting in.
|
|
* Pass them as compiler flags.
|
|
* Make sure you pass the same flags to all compilers since some mrbconf(e.g., `MRB_GC_FIXED_ARENA`)
|
|
changes `struct` layout and cause memory access error when C and other language(e.g., C++) is mixed.
|
|
|
|
## stdio setting.
|
|
`MRB_DISABLE_STDIO`
|
|
* When defined `<stdio.h>` functions won't be used.
|
|
* Some features will be disabled when this is enabled:
|
|
* `mrb_irep` load/dump from/to file.
|
|
* Compiling mruby script from file.
|
|
* Printing features in **src/print.c**.
|
|
|
|
## Debug macros.
|
|
`MRB_ENABLE_DEBUG_HOOK`
|
|
* When defined code fetch hook and debug OP hook will be enabled.
|
|
* When using any of the hook set function pointer `code_fetch_hook` and/or `debug_op_hook` of `mrb_state`.
|
|
* Fetch hook will be called before any OP.
|
|
* Debug OP hook will be called when dispatching `OP_DEBUG`.
|
|
|
|
`MRB_DEBUG`
|
|
* When defined `mrb_assert*` macro will be defined with macros from `<assert.h>`.
|
|
* Could be enabled via `enable_debug` method of `MRuby::Build`.
|
|
|
|
## Stack configuration
|
|
|
|
`MRB_STACK_EXTEND_DOUBLING`
|
|
* If defined doubles the stack size when extending it.
|
|
* Else extends stack with `MRB_STACK_GROWTH`.
|
|
|
|
`MRB_STACK_GROWTH`
|
|
* Default value is `128`.
|
|
* Used in stack extending.
|
|
* Ignored when `MRB_STACK_EXTEND_DOUBLING` is defined.
|
|
|
|
`MRB_STACK_MAX`
|
|
* Default value is `0x40000 - MRB_STACK_GROWTH`.
|
|
* Raises `RuntimeError` when stack size exceeds this value.
|
|
|
|
## Primitive type configuration.
|
|
|
|
`MRB_USE_FLOAT`
|
|
* When defined single precision floating point type(C type `float`) is used as `mrb_float`.
|
|
* Else double precision floating point type(C type `double`) is used as `mrb_float`.
|
|
|
|
`MRB_INT16`
|
|
* When defined `int16_t` will be defined as `mrb_int`.
|
|
* Conflicts with `MRB_INT64`.
|
|
|
|
`MRB_INT64`
|
|
* When defined `int64_t` will be defined as `mrb_int`.
|
|
* Conflicts with `MRB_INT16`.
|
|
* When `MRB_INT16` or `MRB_INT64` isn't defined `int`(most of the times 32-bit integer)
|
|
will be defined as `mrb_int`.
|
|
|
|
## Garbage collector configuration.
|
|
|
|
`MRB_GC_STRESS`
|
|
* When defined full GC is emitted per each `RBasic` allocation.
|
|
* Mainly used in memory manager debugging.
|
|
|
|
`MRB_GC_TURN_OFF_GENERATIONAL`
|
|
* When defined turns generational GC by default.
|
|
|
|
`MRB_GC_FIXED_ARENA`
|
|
* When defined used fixed size GC arena.
|
|
* Raises `RuntimeError` when this is defined and GC arena size exceeds `MRB_GC_ARENA_SIZE`.
|
|
* Useful tracking unnecessary mruby object allocation.
|
|
|
|
`MRB_GC_ARENA_SIZE`
|
|
* Default value is `100`.
|
|
* Ignored when `MRB_GC_FIXED_ARENA` isn't defined.
|
|
* Defines fixed GC arena size.
|
|
|
|
`MRB_HEAP_PAGE_SIZE`
|
|
* Defines value is `1024`.
|
|
* Specifies number of `RBasic` per each heap page.
|
|
|
|
## Memory pool configuration.
|
|
|
|
`POOL_ALIGNMENT`
|
|
* Default value is `4`.
|
|
* If you're allocating data types that requires alignment more than default value define the
|
|
largest value of required alignment.
|
|
|
|
`POOL_PAGE_SIZE`
|
|
* Default value is `16000`.
|
|
* Specifies page size of pool page.
|
|
* Smaller the value is increases memory overhead.
|
|
|
|
## State atexit configuration.
|
|
|
|
`MRB_FIXED_STATE_ATEXIT_STACK`
|
|
* If defined enables fixed size `mrb_state` atexit stack.
|
|
* Raises `RuntimeError` when `mrb_state_atexit` call count to same `mrb_state` exceeds
|
|
`MRB_FIXED_STATE_ATEXIT_STACK_SIZE`'s value.
|
|
|
|
`MRB_FIXED_STATE_ATEXIT_STACK_SIZE`
|
|
* Default value is `5`.
|
|
* If `MRB_FIXED_STATE_ATEXIT_STACK` isn't defined this macro is ignored.
|
|
|
|
## `mrb_value` configuration.
|
|
|
|
`MRB_ENDIAN_BIG`
|
|
* If defined compiles mruby for big endian machines.
|
|
* Used in `MRB_NAN_BOXING`.
|
|
* Some mrbgem use this mrbconf.
|
|
|
|
`MRB_NAN_BOXING`
|
|
* If defined represent `mrb_value` in boxed `double`.
|
|
* Conflicts with `MRB_USE_FLOAT`.
|
|
|
|
`MRB_WORD_BOXING`
|
|
* If defined represent `mrb_value` as a word.
|
|
* If defined `Float` will be a mruby object with `RBasic`.
|
|
|
|
## Instance variable configuration.
|
|
`MRB_USE_IV_SEGLIST`
|
|
* If defined enable segmented list in instance variable table instead of khash.
|
|
* Segmented list is a linked list of key and value segments.
|
|
* It will linear search instead of hash search.
|
|
|
|
`MRB_SEGMENT_SIZE`
|
|
* Default value is `4`.
|
|
* Specifies size of each segment in segment list.
|
|
* Ignored when `MRB_USE_IV_SEGLIST` isn't defined.
|
|
|
|
`MRB_IVHASH_INIT_SIZE`
|
|
* Default value is `8`.
|
|
* Specifies initial size for instance variable table.
|
|
* Ignored when `MRB_USE_IV_SEGLIST` is defined.
|
|
|
|
## Other configuration.
|
|
`MRB_UTF8_STRING`
|
|
* Adds UTF-8 encoding support to character-oriented String instance methods.
|
|
* If it isn't defined, they only support the US-ASCII encoding.
|
|
|
|
`MRB_FUNCALL_ARGC_MAX`
|
|
* Default value is `16`.
|
|
* Specifies 4th argument(`argc`) max value of `mrb_funcall`.
|
|
* Raises `ArgumentError` when the `argc` argument is bigger then this value `mrb_funcall`.
|
|
|
|
`KHASH_DEFAULT_SIZE`
|
|
* Default value is `32`.
|
|
* Specifies default size of khash table bucket.
|
|
* Used in `kh_init_ ## name` function.
|
|
|
|
`MRB_STR_BUF_MIN_SIZE`
|
|
* Default value is `128`.
|
|
* Specifies initial capacity of `RString` created by `mrb_str_buf_new` function..
|