… | |
… | |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
39 | */ |
39 | */ |
40 | |
40 | |
41 | #include "coro.h" |
41 | #include "coro.h" |
42 | |
42 | |
|
|
43 | #include <stddef.h> |
43 | #include <string.h> |
44 | #include <string.h> |
44 | |
45 | |
45 | /*****************************************************************************/ |
46 | /*****************************************************************************/ |
46 | /* ucontext/setjmp/asm backends */ |
47 | /* ucontext/setjmp/asm backends */ |
47 | /*****************************************************************************/ |
48 | /*****************************************************************************/ |
… | |
… | |
239 | ); |
240 | ); |
240 | |
241 | |
241 | # endif |
242 | # endif |
242 | |
243 | |
243 | void |
244 | void |
244 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
245 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
245 | { |
246 | { |
246 | coro_context nctx; |
247 | coro_context nctx; |
247 | # if CORO_SJLJ |
248 | # if CORO_SJLJ |
248 | stack_t ostk, nstk; |
249 | stack_t ostk, nstk; |
249 | struct sigaction osa, nsa; |
250 | struct sigaction osa, nsa; |
… | |
… | |
441 | pthread_testcancel (); |
442 | pthread_testcancel (); |
442 | #endif |
443 | #endif |
443 | } |
444 | } |
444 | |
445 | |
445 | void |
446 | void |
446 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
447 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
447 | { |
448 | { |
448 | static coro_context nctx; |
449 | static coro_context nctx; |
449 | static int once; |
450 | static int once; |
450 | |
451 | |
451 | if (!once) |
452 | if (!once) |
… | |
… | |
506 | /* fiber backend */ |
507 | /* fiber backend */ |
507 | /*****************************************************************************/ |
508 | /*****************************************************************************/ |
508 | #elif CORO_FIBER |
509 | #elif CORO_FIBER |
509 | |
510 | |
510 | #define WIN32_LEAN_AND_MEAN |
511 | #define WIN32_LEAN_AND_MEAN |
|
|
512 | #if _WIN32_WINNT < 0x0400 |
|
|
513 | #undef _WIN32_WINNT |
|
|
514 | #define _WIN32_WINNT 0x0400 |
|
|
515 | #endif |
511 | #include <windows.h> |
516 | #include <windows.h> |
512 | |
517 | |
513 | VOID CALLBACK |
518 | VOID CALLBACK |
514 | coro_init (PVOID arg) |
519 | coro_init (PVOID arg) |
515 | { |
520 | { |
… | |
… | |
531 | |
536 | |
532 | SwitchToFiber (next->fiber); |
537 | SwitchToFiber (next->fiber); |
533 | } |
538 | } |
534 | |
539 | |
535 | void |
540 | void |
536 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
541 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
537 | { |
542 | { |
538 | ctx->fiber = 0; |
543 | ctx->fiber = 0; |
539 | ctx->coro = coro; |
544 | ctx->coro = coro; |
540 | ctx->arg = arg; |
545 | ctx->arg = arg; |
541 | |
546 | |
… | |
… | |
550 | { |
555 | { |
551 | DeleteFiber (ctx->fiber); |
556 | DeleteFiber (ctx->fiber); |
552 | } |
557 | } |
553 | |
558 | |
554 | #else |
559 | #else |
555 | # error unsupported backend |
560 | #error unsupported backend |
|
|
561 | #endif |
|
|
562 | |
|
|
563 | /*****************************************************************************/ |
|
|
564 | /* stack management */ |
|
|
565 | /*****************************************************************************/ |
|
|
566 | #if CORO_STACKALLOC |
|
|
567 | |
|
|
568 | #include <stdlib.h> |
|
|
569 | |
|
|
570 | #ifndef _WIN32 |
|
|
571 | # include <unistd.h> |
|
|
572 | #endif |
|
|
573 | |
|
|
574 | #if CORO_USE_VALGRIND |
|
|
575 | # include <valgrind/valgrind.h> |
|
|
576 | #endif |
|
|
577 | |
|
|
578 | #if _POSIX_MAPPED_FILES |
|
|
579 | # include <sys/mman.h> |
|
|
580 | # define CORO_MMAP 1 |
|
|
581 | # ifndef MAP_ANONYMOUS |
|
|
582 | # ifdef MAP_ANON |
|
|
583 | # define MAP_ANONYMOUS MAP_ANON |
|
|
584 | # else |
|
|
585 | # undef CORO_MMAP |
|
|
586 | # endif |
556 | #endif |
587 | # endif |
|
|
588 | # include <limits.h> |
|
|
589 | #else |
|
|
590 | # undef CORO_MMAP |
|
|
591 | #endif |
557 | |
592 | |
|
|
593 | #if _POSIX_MEMORY_PROTECTION |
|
|
594 | # ifndef CORO_GUARDPAGES |
|
|
595 | # define CORO_GUARDPAGES 4 |
|
|
596 | # endif |
|
|
597 | #else |
|
|
598 | # undef CORO_GUARDPAGES |
|
|
599 | #endif |
|
|
600 | |
|
|
601 | #if !CORO_MMAP |
|
|
602 | # undef CORO_GUARDPAGES |
|
|
603 | #endif |
|
|
604 | |
|
|
605 | #if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 |
|
|
606 | # undef CORO_GUARDPAGES |
|
|
607 | #endif |
|
|
608 | |
|
|
609 | #ifndef CORO_GUARDPAGES |
|
|
610 | # define CORO_GUARDPAGES 0 |
|
|
611 | #endif |
|
|
612 | |
|
|
613 | #if !PAGESIZE |
|
|
614 | #if !CORO_MMAP |
|
|
615 | #define PAGESIZE 4096 |
|
|
616 | #else |
|
|
617 | static size_t |
|
|
618 | coro_pagesize (void) |
|
|
619 | { |
|
|
620 | static size_t pagesize; |
|
|
621 | |
|
|
622 | if (!pagesize) |
|
|
623 | pagesize = sysconf (_SC_PAGESIZE); |
|
|
624 | |
|
|
625 | return pagesize; |
|
|
626 | } |
|
|
627 | |
|
|
628 | #define PAGESIZE coro_pagesize () |
|
|
629 | #endif |
|
|
630 | #endif |
|
|
631 | |
|
|
632 | int |
|
|
633 | coro_stack_alloc (struct coro_stack *stack, unsigned int size) |
|
|
634 | { |
|
|
635 | if (!size) |
|
|
636 | size = 256 * 1024; |
|
|
637 | |
|
|
638 | stack->sptr = 0; |
|
|
639 | stack->ssze = ((size_t)size * sizeof (void *) + PAGESIZE - 1) / PAGESIZE * PAGESIZE; |
|
|
640 | |
|
|
641 | #if CORO_FIBER |
|
|
642 | |
|
|
643 | stack->sptr = (void *)stack; |
|
|
644 | return 1; |
|
|
645 | |
|
|
646 | #else |
|
|
647 | |
|
|
648 | size_t ssze = stack->ssze + CORO_GUARDPAGES * PAGESIZE; |
|
|
649 | void *base; |
|
|
650 | |
|
|
651 | #if CORO_MMAP |
|
|
652 | /* mmap supposedly does allocate-on-write for us */ |
|
|
653 | base = mmap (0, ssze, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
|
|
654 | |
|
|
655 | if (base == (void *)-1) |
|
|
656 | { |
|
|
657 | /* some systems don't let us have executable heap */ |
|
|
658 | /* we assume they won't need executable stack in that case */ |
|
|
659 | base = mmap (0, ssze, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
|
|
660 | |
|
|
661 | if (base == (void *)-1) |
|
|
662 | return 0; |
|
|
663 | } |
|
|
664 | |
|
|
665 | #if CORO_GUARDPAGES |
|
|
666 | mprotect (base, CORO_GUARDPAGES * PAGESIZE, PROT_NONE); |
|
|
667 | #endif |
|
|
668 | |
|
|
669 | base = (void*)((char *)base + CORO_GUARDPAGES * PAGESIZE); |
|
|
670 | #else |
|
|
671 | base = malloc (ssze); |
|
|
672 | if (!base) |
|
|
673 | return 0; |
|
|
674 | #endif |
|
|
675 | |
|
|
676 | #if CORO_USE_VALGRIND |
|
|
677 | stack->valgrind_id = VALGRIND_STACK_REGISTER ((char *)base, ((char *)base) + ssze - CORO_GUARDPAGES * PAGESIZE); |
|
|
678 | #endif |
|
|
679 | |
|
|
680 | stack->sptr = base; |
|
|
681 | return 1; |
|
|
682 | |
|
|
683 | #endif |
|
|
684 | } |
|
|
685 | |
|
|
686 | void |
|
|
687 | coro_stack_free (struct coro_stack *stack) |
|
|
688 | { |
|
|
689 | #if CORO_FIBER |
|
|
690 | /* nop */ |
|
|
691 | #else |
|
|
692 | #if CORO_USE_VALGRIND |
|
|
693 | VALGRIND_STACK_DEREGISTER (stack->valgrind_id); |
|
|
694 | #endif |
|
|
695 | |
|
|
696 | #if CORO_MMAP |
|
|
697 | if (stack->sptr) |
|
|
698 | munmap ((void*)((char *)stack->sptr - CORO_GUARDPAGES * PAGESIZE), |
|
|
699 | stack->ssze + CORO_GUARDPAGES * PAGESIZE); |
|
|
700 | #else |
|
|
701 | free (stack->sptr); |
|
|
702 | #endif |
|
|
703 | #endif |
|
|
704 | } |
|
|
705 | |
|
|
706 | #endif |
|
|
707 | |