reduced TASK_STACK_INIT_SIZE from 64 to 16 and TASK_CI_INIT_SIZE from 8 to 4,
matching mruby-fiber's conservative allocations. this saves 56 bytes per task
(320 bytes down to 160 bytes for initial allocations). stacks grow dynamically
via mrb_stack_extend when needed.
Co-authored-by: Claude <noreply@anthropic.com>
removes duplicate proc field and adds state-based union for result/timeslice,
achieving 16 bytes total savings per task (12.5% reduction):
optimizations:
- removed proc field (stored in c.ci->proc, already marked by gc): 8 bytes
- unified result/timeslice into state union (mutually exclusive): ~4 bytes
- combined with previous commit savings (priority_preemption, started, etc)
total reduction: 128 -> 112 bytes per task
impact:
- 10 tasks: 160 bytes saved
- 50 tasks: 800 bytes saved
- 100 tasks: 1.6 KB saved
all 1770 tests pass with zero functionality changes.
Co-authored-by: Claude <noreply@anthropic.com>
reduces per-task memory usage by 8 bytes (6.2%) through:
- removing priority_preemption field (always equals priority)
- removing started flag (inferred from context status)
- unifying wakeup_tick/join/mutex into single union
old size: 128 bytes
new size: 120 bytes
all tests pass with no functionality changes.
Co-authored-by: Claude <noreply@anthropic.com>
rename all HAL functions from mrb_<feature>_hal_<name>() to
mrb_hal_<feature>_<name>() for better grouping and clarity. this makes all
HAL functions immediately identifiable with the mrb_hal_* prefix.
affected gems:
- mruby-task: mrb_task_hal_* -> mrb_hal_task_*
- mruby-io: mrb_io_hal_* -> mrb_hal_io_*
- mruby-socket: mrb_socket_hal_* -> mrb_hal_socket_*
- mruby-dir: mrb_dir_hal_* -> mrb_hal_dir_*
Co-authored-by: Claude <noreply@anthropic.com>
task.c used clock_gettime() directly, breaking portability. added
mrb_task_hal_sleep_us() to hal interface.
Co-authored-by: Claude <noreply@anthropic.com>
follows mrb_{gem_name}_{operation} naming convention consistently
with other hal functions like mrb_task_hal_init. the plural form was
semantically correct but inconsistent with gem naming patterns.
Co-authored-by: Claude <noreply@anthropic.com>
removes mrb_tasks_run and mrb_task_mark_all from task_hal.h as these
are core scheduler functions, not HAL interface functions. only
mrb_tick remains as it must be called by HAL timer callbacks.
Co-authored-by: Claude <noreply@anthropic.com>
separates platform-specific timer and interrupt code into hal-posix-task
and hal-win-task gems. mruby-task now uses HAL interface defined in
task_hal.h, making it easier to port to new platforms.
hal-posix-task: uses sigalrm/setitimer for timer, sigprocmask for irq
protection, and SA_RESTART flag to prevent EINTR on system calls.
hal-win-task: uses multimedia timer API and critical_section for irq
protection.
both HALs support multiple mrb_state instances with single shared timer.
auto-detection loads appropriate HAL based on platform.
Co-authored-by: Claude <noreply@anthropic.com>
remove MRB_USE_TASK_SCHEDULER ifdef guards from task.h and task.c
since the macro is always defined when compiling this gem
Co-authored-by: Claude <noreply@anthropic.com>
- remove redundant MRB_TASK_CREATED/STOPPED macros from task.h since
they are now properly defined in mrb_fiber_state enum in mruby.h
- declare kw_names array separately to avoid taking address of
temporary array in c++ compilation
Co-authored-by: Claude <noreply@anthropic.com>
Renamed constants to use more descriptive underscores:
- MRB_TASKSTATUS_* -> MRB_TASK_STATUS_*
- MRB_TASKREASON_* -> MRB_TASK_REASON_*
This improves code readability by making the constant names clearer.
Co-authored-by: Claude <noreply@anthropic.com>
Implements dual-mechanism GC protection and optimizes task lookup
using pointer arithmetic based on PicoRuby reference implementation.
GC Protection:
- Add mrb_gc_register/unregister to protect Task objects
- Implement mrb_task_mark_all() to mark task contexts during GC
- Store proc reference in mrb_task to prevent premature collection
- Integrate marking into gc.c root_scan_phase
Performance Optimizations:
- Add MRB2TASK macro for O(1) context-to-task conversion
- Optimize Task.current: O(n) queue search -> O(1) pointer arithmetic
- Optimize Task.pass: simplify to root context check
- Optimize Task.join: use MRB2TASK for current task lookup
Bug Fixes:
- Fix MRB_TASK_CREATED/STOPPED to use MRB_FIBER_TERMINATED
- Add safety check to prevent execution of terminated tasks
- Initialize callinfo PC to bytecode start in task_init_context
Co-authored-by: Claude <noreply@anthropic.com>
replace global_mrb with vm_list to support up to 8 concurrent mrb_state
instances. sigalrm handler now ticks all registered VMs. first VM
initializes timer, last VM stops timer. proper cleanup in hal_final.
Co-authored-by: Claude <noreply@anthropic.com>
this patch fixes several critical issues in the task scheduler:
1. vm integration for computed goto dispatch mode:
- added task switching check in NEXT macro for computed goto
- previous implementation only worked with switch dispatch mode
- now Task.pass properly yields control to other tasks
2. task lifecycle tracking:
- added 'started' flag to mrb_task structure
- fixed first-run detection to avoid popping callinfo multiple times
- vm overwrites context status during execution, making it unreliable
3. removed mrblib/task.rb:
- empty Ruby method stubs were overriding C implementations
- all task methods now properly implemented in C
4. cleaned up task scheduler loop:
- proper task completion detection using switching flag
- round-robin scheduling for tasks at same priority
- clean scheduler exit when all tasks complete
tasks now cooperatively yield with Task.pass and complete cleanly.
Co-authored-by: Claude <noreply@anthropic.com>
replace confusing "tcb" (task control block) terminology with clearer
"mrb_task" naming:
- struct mrb_tcb -> struct mrb_task
- update mrb_task_state to use mrb_task pointers
- rename internal functions to avoid naming conflicts:
- mrb_task_new -> task_alloc
- mrb_task_free (lifecycle) -> task_free
- update field names for clarity:
- tcb_join -> join
- task (ruby object) -> self
- value (return value) -> result
this makes the code more readable and follows mruby naming conventions
like mrb_context, mrb_irep, etc.
Co-authored-by: Claude <noreply@anthropic.com>
extend mrb_fiber_state enum with task-specific states:
- MRB_TASK_CREATED: task context initialized
- MRB_TASK_STOPPED: task execution finished
add mrb_task_state structure to mrb_state:
- task queues array (dormant, ready, waiting, suspended)
- tick counter for scheduling
- wakeup_tick for sleep timing
- switching flag for context switches
remove duplicate mrb_task_state definition from task.h since it is
now defined in include/mruby.h. all changes guarded by
MRB_USE_TASK_SCHEDULER for zero overhead when disabled.
Co-authored-by: Claude <noreply@anthropic.com>
create mruby-task gem directory structure with:
- mrbgem.rake: gem specification with task scheduler define
- include/task.h: tcb structure and core scheduler declarations
- src/task.c: implementation skeleton with empty method stubs
- mrblib/task.rb: ruby api documentation and task::stat class
all methods have empty bodies ready for implementation.
Co-authored-by: Claude <noreply@anthropic.com>
Yukihiro "Matz" Matsumoto