diff options
Diffstat (limited to 'erts/emulator/beam/global.h')
| -rwxr-xr-x | erts/emulator/beam/global.h | 346 |
1 files changed, 174 insertions, 172 deletions
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h index 94bc1b172a..c44f532366 100755 --- a/erts/emulator/beam/global.h +++ b/erts/emulator/beam/global.h @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2013. All Rights Reserved. + * Copyright Ericsson AB 1996-2014. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in @@ -370,231 +370,233 @@ extern int stackdump_on_exit; * DESTROY_ESTACK(Stack) */ +typedef struct { + UWord* start; + UWord* sp; + UWord* end; + ErtsAlcType_t alloc_type; +}ErtsEStack; -void erl_grow_stack(ErtsAlcType_t a_type, Eterm** start, Eterm** sp, Eterm** end); -#define ESTK_CONCAT(a,b) a##b -#define ESTK_SUBSCRIPT(s,i) *((Eterm *)((byte *)ESTK_CONCAT(s,_start) + (i))) #define DEF_ESTACK_SIZE (16) -#define DECLARE_ESTACK(s) \ - Eterm ESTK_CONCAT(s,_default_stack)[DEF_ESTACK_SIZE]; \ - Eterm* ESTK_CONCAT(s,_start) = ESTK_CONCAT(s,_default_stack); \ - Eterm* ESTK_CONCAT(s,_sp) = ESTK_CONCAT(s,_start); \ - Eterm* ESTK_CONCAT(s,_end) = ESTK_CONCAT(s,_start) + DEF_ESTACK_SIZE;\ - ErtsAlcType_t ESTK_CONCAT(s,_alloc_type) = ERTS_ALC_T_ESTACK +void erl_grow_estack(ErtsEStack*, Eterm* def_stack); +#define ESTK_CONCAT(a,b) a##b +#define ESTK_DEF_STACK(s) ESTK_CONCAT(s,_default_estack) + +#define DECLARE_ESTACK(s) \ + UWord ESTK_DEF_STACK(s)[DEF_ESTACK_SIZE]; \ + ErtsEStack s = { \ + ESTK_DEF_STACK(s), /* start */ \ + ESTK_DEF_STACK(s), /* sp */ \ + ESTK_DEF_STACK(s) + DEF_ESTACK_SIZE, /* end */ \ + ERTS_ALC_T_ESTACK /* alloc_type */ \ + } #define ESTACK_CHANGE_ALLOCATOR(s,t) \ do { \ - if (ESTK_CONCAT(s,_start) != ESTK_CONCAT(s,_default_stack)) { \ + if (s.start != ESTK_DEF_STACK(s)) { \ erl_exit(1, "Internal error - trying to change allocator " \ "type of active estack\n"); \ } \ - ESTK_CONCAT(s,_alloc_type) = (t); \ + s.alloc_type = (t); \ } while (0) +#define DESTROY_ESTACK(s) \ +do { \ + if (s.start != ESTK_DEF_STACK(s)) { \ + erts_free(s.alloc_type, s.start); \ + } \ +} while(0) + + /* - * Do not free the stack after this, it may have pointers into what - * was saved in 'v'. 'v' and 'vsize' are changed by this macro. If - * 'v' points to anything, it should have been allocated by a previous - * call to this macro. Be careful to set a correct allocator prior to - * saving. - * 'v' can be any lvalue pointer, it will point to an array of UWord - * after calling this macro. + * Do not free the stack after this, it may have pointers into what + * was saved in 'dst'. */ -#define ESTACK_SAVE(s,v,vsize) /* v and vsize are "name parameters" */ \ -do { \ - Uint _esz = ESTACK_COUNT(s); \ - if (ESTK_CONCAT(s,_start) == ESTK_CONCAT(s,_default_stack)) { \ - if ((v) == NULL) { \ - (v) = erts_alloc(ESTK_CONCAT(s,_alloc_type), \ - DEF_ESTACK_SIZE * sizeof(Eterm)); \ - } \ - memcpy((v),ESTK_CONCAT(s,_start),_esz*sizeof(Eterm)); \ - } else { \ - (v) = (void *) ESTK_CONCAT(s,_start); \ - } \ - (vsize) = _esz; \ +#define ESTACK_SAVE(s,dst)\ +do {\ + if (s.start == ESTK_DEF_STACK(s)) {\ + UWord _wsz = ESTACK_COUNT(s);\ + (dst)->start = erts_alloc(s.alloc_type,\ + DEF_ESTACK_SIZE * sizeof(UWord));\ + memcpy((dst)->start, s.start,_wsz*sizeof(UWord));\ + (dst)->sp = (dst)->start + _wsz;\ + (dst)->end = (dst)->start + DEF_ESTACK_SIZE;\ + (dst)->alloc_type = s.alloc_type;\ + } else\ + *(dst) = s;\ } while (0) -/* - * Use on empty stack, only the allocator can be changed before this - * The vector parameter is reset to NULL if the vector is moved to stack, - * otherwise it's kept for reuse, so a saved and restored vector might - * need freeing using the correct allocator parameter. - * 'v' can be any lvalue pointer, it's cast to an (Eterm *). +#define DESTROY_SAVED_ESTACK(estack)\ +do {\ + if ((estack)->start) {\ + erts_free((estack)->alloc_type, (estack)->start);\ + (estack)->start = NULL;\ + }\ +} while(0) + +/* + * Use on empty stack, only the allocator can be changed before this. + * The src stack is reset to NULL. */ -#define ESTACK_RESTORE(s, v, vsize) /*v is a "name parameter"*/ \ -do { \ - if ((vsize) > DEF_ESTACK_SIZE) { \ - Uint _ca = DEF_ESTACK_SIZE; \ - while (_ca < (vsize)) \ - _ca = _ca * 2; \ - ESTK_CONCAT(s,_start) = (Eterm *) (v); \ - ESTK_CONCAT(s,_end) = ((Eterm *)(v)) + _ca; \ - ESTK_CONCAT(s,_sp) = ESTK_CONCAT(s,_start) + (vsize); \ - (v) = NULL; \ - } else { \ - memcpy(ESTK_CONCAT(s,_start),(v),(vsize)*sizeof(Eterm));\ - ESTK_CONCAT(s,_sp) = ESTK_CONCAT(s,_start) + (vsize); \ - } \ - } while (0) +#define ESTACK_RESTORE(s, src) \ +do { \ + ASSERT(s.start == ESTK_DEF_STACK(s)); \ + s = *(src); /* struct copy */ \ + (src)->start = NULL; \ + ASSERT(s.sp >= s.start); \ + ASSERT(s.sp <= s.end); \ +} while (0) -#define ESTACK_IS_STATIC(s) (ESTK_CONCAT(s,_start) == ESTK_CONCAT(s,_default_stack)) +#define ESTACK_IS_STATIC(s) (s.start == ESTK_DEF_STACK(s))) -#define DESTROY_ESTACK(s) \ -do { \ - if (ESTK_CONCAT(s,_start) != ESTK_CONCAT(s,_default_stack)) { \ - erts_free(ESTK_CONCAT(s,_alloc_type), ESTK_CONCAT(s,_start)); \ - } \ +#define ESTACK_PUSH(s, x) \ +do { \ + if (s.sp == s.end) { \ + erl_grow_estack(&s, ESTK_DEF_STACK(s)); \ + } \ + *s.sp++ = (x); \ } while(0) -#define ESTACK_PUSH(s, x) \ -do { \ - if (ESTK_CONCAT(s,_sp) == ESTK_CONCAT(s,_end)) { \ - erl_grow_stack(ESTK_CONCAT(s,_alloc_type),&ESTK_CONCAT(s,_start), \ - &ESTK_CONCAT(s,_sp), &ESTK_CONCAT(s,_end)); \ - } \ - *ESTK_CONCAT(s,_sp)++ = (x); \ +#define ESTACK_PUSH2(s, x, y) \ +do { \ + if (s.sp > s.end - 2) { \ + erl_grow_estack(&s, ESTK_DEF_STACK(s)); \ + } \ + *s.sp++ = (x); \ + *s.sp++ = (y); \ } while(0) -#define ESTACK_PUSH2(s, x, y) \ -do { \ - if (ESTK_CONCAT(s,_sp) > ESTK_CONCAT(s,_end) - 2) { \ - erl_grow_stack(ESTK_CONCAT(s,_alloc_type),&ESTK_CONCAT(s,_start), \ - &ESTK_CONCAT(s,_sp), &ESTK_CONCAT(s,_end)); \ - } \ - *ESTK_CONCAT(s,_sp)++ = (x); \ - *ESTK_CONCAT(s,_sp)++ = (y); \ +#define ESTACK_PUSH3(s, x, y, z) \ +do { \ + if (s.sp > s.end - 3) { \ + erl_grow_estack(&s, ESTK_DEF_STACK(s)); \ + } \ + *s.sp++ = (x); \ + *s.sp++ = (y); \ + *s.sp++ = (z); \ } while(0) -#define ESTACK_PUSH3(s, x, y, z) \ -do { \ - if (ESTK_CONCAT(s,_sp) > ESTK_CONCAT(s,_end) - 3) { \ - erl_grow_stack(&ESTK_CONCAT(s,_start), &ESTK_CONCAT(s,_sp), \ - &ESTK_CONCAT(s,_end)); \ - } \ - *ESTK_CONCAT(s,_sp)++ = (x); \ - *ESTK_CONCAT(s,_sp)++ = (y); \ - *ESTK_CONCAT(s,_sp)++ = (z); \ -} while(0) +#define ESTACK_COUNT(s) (s.sp - s.start) +#define ESTACK_ISEMPTY(s) (s.sp == s.start) +#define ESTACK_POP(s) (*(--s.sp)) -#define ESTACK_COUNT(s) (ESTK_CONCAT(s,_sp) - ESTK_CONCAT(s,_start)) -#define ESTACK_ISEMPTY(s) (ESTK_CONCAT(s,_sp) == ESTK_CONCAT(s,_start)) -#define ESTACK_POP(s) (*(--ESTK_CONCAT(s,_sp))) +/* + * WSTACK: same as ESTACK but with UWord instead of Eterm + */ +typedef struct { + UWord* wstart; + UWord* wsp; + UWord* wend; + ErtsAlcType_t alloc_type; +}ErtsWStack; -void erl_grow_wstack(ErtsAlcType_t a_type, UWord** start, UWord** sp, UWord** end); -#define WSTK_CONCAT(a,b) a##b -#define WSTK_SUBSCRIPT(s,i) *((UWord *)((byte *)WSTK_CONCAT(s,_start) + (i))) #define DEF_WSTACK_SIZE (16) -#define DECLARE_WSTACK(s) \ - UWord WSTK_CONCAT(s,_default_stack)[DEF_WSTACK_SIZE]; \ - UWord* WSTK_CONCAT(s,_start) = WSTK_CONCAT(s,_default_stack); \ - UWord* WSTK_CONCAT(s,_sp) = WSTK_CONCAT(s,_start); \ - UWord* WSTK_CONCAT(s,_end) = WSTK_CONCAT(s,_start) + DEF_WSTACK_SIZE; \ - ErtsAlcType_t WSTK_CONCAT(s,_alloc_type) = ERTS_ALC_T_ESTACK +void erl_grow_wstack(ErtsWStack*, Eterm* def_stack); +#define WSTK_CONCAT(a,b) a##b +#define WSTK_DEF_STACK(s) WSTK_CONCAT(s,_default_wstack) + +#define DECLARE_WSTACK(s) \ + UWord WSTK_DEF_STACK(s)[DEF_WSTACK_SIZE]; \ + ErtsWStack s = { \ + WSTK_DEF_STACK(s), /* wstart */ \ + WSTK_DEF_STACK(s), /* wsp */ \ + WSTK_DEF_STACK(s) + DEF_WSTACK_SIZE, /* wend */ \ + ERTS_ALC_T_ESTACK /* alloc_type */ \ + } #define WSTACK_CHANGE_ALLOCATOR(s,t) \ do { \ - if (WSTK_CONCAT(s,_start) != WSTK_CONCAT(s,_default_stack)) { \ + if (s.wstart != WSTK_DEF_STACK(s)) { \ erl_exit(1, "Internal error - trying to change allocator " \ "type of active wstack\n"); \ } \ - WSTK_CONCAT(s,_alloc_type) = (t); \ + s.alloc_type = (t); \ } while (0) -#define DESTROY_WSTACK(s) \ -do { \ - if (WSTK_CONCAT(s,_start) != WSTK_CONCAT(s,_default_stack)) { \ - erts_free(WSTK_CONCAT(s,_alloc_type), WSTK_CONCAT(s,_start)); \ - } \ +#define DESTROY_WSTACK(s) \ +do { \ + if (s.wstart != WSTK_DEF_STACK(s)) { \ + erts_free(s.alloc_type, s.wstart); \ + } \ } while(0) + /* - * Do not free the stack after this, it may have pointers into what - * was saved in 'v'. 'v' and 'vsize' are changed by this macro. If - * 'v' points to anything, it should have been allocated by a previous - * call to this macro. Be careful to set a correct allocator prior to - * saving. - * 'v' can be any lvalue pointer, it will point to an array of UWord - * after calling this macro. + * Do not free the stack after this, it may have pointers into what + * was saved in 'dst'. */ -#define WSTACK_SAVE(s,v,vsize) /* v and vsize are "name parameters" */ \ -do { \ - Uint _wsz = WSTACK_COUNT(s); \ - if (WSTK_CONCAT(s,_start) == WSTK_CONCAT(s,_default_stack)) { \ - if ((v) == NULL) { \ - (v) = erts_alloc(WSTK_CONCAT(s,_alloc_type), \ - DEF_WSTACK_SIZE * sizeof(UWord)); \ - } \ - memcpy((v),WSTK_CONCAT(s,_start),_wsz*sizeof(UWord)); \ - } else { \ - (v) = (void *) WSTK_CONCAT(s,_start); \ - } \ - (vsize) = _wsz; \ +#define WSTACK_SAVE(s,dst)\ +do {\ + if (s.wstart == WSTK_DEF_STACK(s)) {\ + UWord _wsz = WSTACK_COUNT(s);\ + (dst)->wstart = erts_alloc(s.alloc_type,\ + DEF_WSTACK_SIZE * sizeof(UWord));\ + memcpy((dst)->wstart, s.wstart,_wsz*sizeof(UWord));\ + (dst)->wsp = (dst)->wstart + _wsz;\ + (dst)->wend = (dst)->wstart + DEF_WSTACK_SIZE;\ + (dst)->alloc_type = s.alloc_type;\ + } else\ + *(dst) = s;\ } while (0) -/* - * Use on empty stack, only the allocator can be changed before this - * The vector parameter is reset to NULL if the vector is moved to stack, - * otherwise it's kept for reuse, so a saved and restored vector might - * need freeing using the correct allocator parameter. - * 'v' can be any lvalue pointer, it's cast to an (UWord *). +#define DESTROY_SAVED_WSTACK(wstack)\ +do {\ + if ((wstack)->wstart) {\ + erts_free((wstack)->alloc_type, (wstack)->wstart);\ + (wstack)->wstart = NULL;\ + }\ +} while(0) + +/* + * Use on empty stack, only the allocator can be changed before this. + * The src stack is reset to NULL. */ -#define WSTACK_RESTORE(s, v, vsize) /*v is a "name parameter"*/ \ -do { \ - if ((vsize) > DEF_WSTACK_SIZE) { \ - Uint _ca = DEF_WSTACK_SIZE; \ - while (_ca < (vsize)) \ - _ca = _ca * 2; \ - WSTK_CONCAT(s,_start) = (UWord *) (v); \ - WSTK_CONCAT(s,_end) = ((UWord *)(v)) + _ca; \ - WSTK_CONCAT(s,_sp) = WSTK_CONCAT(s,_start) + (vsize); \ - (v) = NULL; \ - } else { \ - memcpy(WSTK_CONCAT(s,_start),(v),(vsize)*sizeof(UWord));\ - WSTK_CONCAT(s,_sp) = WSTK_CONCAT(s,_start) + (vsize); \ - } \ - } while (0) +#define WSTACK_RESTORE(s, src) \ +do { \ + ASSERT(s.wstart == WSTK_DEF_STACK(s)); \ + s = *(src); /* struct copy */ \ + (src)->wstart = NULL; \ + ASSERT(s.wsp >= s.wstart); \ + ASSERT(s.wsp <= s.wend); \ +} while (0) -#define WSTACK_IS_STATIC(s) (WSTK_CONCAT(s,_start) == WSTK_CONCAT(s,_default_stack)) +#define WSTACK_IS_STATIC(s) (s.wstart == WSTK_DEF_STACK(s))) -#define WSTACK_PUSH(s, x) \ -do { \ - if (WSTK_CONCAT(s,_sp) == WSTK_CONCAT(s,_end)) { \ - erl_grow_wstack(WSTK_CONCAT(s,_alloc_type), &WSTK_CONCAT(s,_start), \ - &WSTK_CONCAT(s,_sp), &WSTK_CONCAT(s,_end)); \ - } \ - *WSTK_CONCAT(s,_sp)++ = (x); \ +#define WSTACK_PUSH(s, x) \ +do { \ + if (s.wsp == s.wend) { \ + erl_grow_wstack(&s, WSTK_DEF_STACK(s)); \ + } \ + *s.wsp++ = (x); \ } while(0) -#define WSTACK_PUSH2(s, x, y) \ -do { \ - if (WSTK_CONCAT(s,_sp) > WSTK_CONCAT(s,_end) - 2) { \ - erl_grow_wstack(WSTK_CONCAT(s,_alloc_type), &WSTK_CONCAT(s,_start), \ - &WSTK_CONCAT(s,_sp), &WSTK_CONCAT(s,_end)); \ - } \ - *WSTK_CONCAT(s,_sp)++ = (x); \ - *WSTK_CONCAT(s,_sp)++ = (y); \ +#define WSTACK_PUSH2(s, x, y) \ +do { \ + if (s.wsp > s.wend - 2) { \ + erl_grow_wstack(&s, WSTK_DEF_STACK(s)); \ + } \ + *s.wsp++ = (x); \ + *s.wsp++ = (y); \ } while(0) -#define WSTACK_PUSH3(s, x, y, z) \ -do { \ - if (WSTK_CONCAT(s,_sp) > WSTK_CONCAT(s,_end) - 3) { \ - erl_grow_wstack(WSTK_CONCAT(s,_alloc_type), &WSTK_CONCAT(s,_start), \ - &WSTK_CONCAT(s,_sp), &WSTK_CONCAT(s,_end)); \ - } \ - *WSTK_CONCAT(s,_sp)++ = (x); \ - *WSTK_CONCAT(s,_sp)++ = (y); \ - *WSTK_CONCAT(s,_sp)++ = (z); \ +#define WSTACK_PUSH3(s, x, y, z) \ +do { \ + if (s.wsp > s.wend - 3) { \ + erl_grow_wstack(&s, WSTK_DEF_STACK(s)); \ + } \ + *s.wsp++ = (x); \ + *s.wsp++ = (y); \ + *s.wsp++ = (z); \ } while(0) -#define WSTACK_COUNT(s) (WSTK_CONCAT(s,_sp) - WSTK_CONCAT(s,_start)) +#define WSTACK_COUNT(s) (s.wsp - s.wstart) +#define WSTACK_ISEMPTY(s) (s.wsp == s.wstart) +#define WSTACK_POP(s) (*(--s.wsp)) -#define WSTACK_ISEMPTY(s) (WSTK_CONCAT(s,_sp) == WSTK_CONCAT(s,_start)) -#define WSTACK_POP(s) (*(--WSTK_CONCAT(s,_sp))) /* binary.c */ |