/* i/n/a.h ** ** This file is in the public domain. */ /** Options. **/ /* U3_MEMORY_DEBUG: add debugging information to heap. Breaks image. */ # undef U3_MEMORY_DEBUG /* U3_CELLOC_TOGGLE: enable toggling of the custom cell allocator * via -g. This slightly slows down the cell allocator even when * it's on. Note that toggling -g breaks (maybe?) the image. If * U3_MEMORY_DEBUG is on, this should generally be on as well. */ # undef U3_CELLOC_TOGGLE /* U3_PRINT_WATERMARK: print watermark information for each road */ # undef U3_PRINT_WATERMARK /** Constants. **/ /* u3a_bits: number of bits in word-addressed pointer. 29 == 2GB. */ # define u3a_bits 29 /* u3a_page: number of bits in word-addressed page. 12 == 16Kbyte page. */ # define u3a_page 12 /* u3a_pages: number of pages in memory. */ # define u3a_pages (1 << (u3a_bits - u3a_page)) /* u3a_words: number of words in memory. */ # define u3a_words (1 << u3a_bits) /* u3a_bytes: number of bytes in memory. */ # define u3a_bytes (c3_w)((1 << (2 + u3a_bits))) /* u3a_minimum: minimum number of words in a box. */ #ifdef U3_MEMORY_DEBUG # define u3a_minimum 8 #else # define u3a_minimum 6 #endif /* u3a_fbox_no: number of free lists per size. */ # define u3a_fbox_no 27 /** Structures. **/ /* u3a_atom, u3a_cell: logical atom and cell structures. */ typedef struct { c3_w mug_w; } u3a_noun; typedef struct { c3_w mug_w; c3_w len_w; c3_w buf_w[0]; } u3a_atom; typedef struct { c3_w mug_w; u3_noun hed; u3_noun tel; } u3a_cell; /* u3a_box: classic allocation box. ** ** The box size is also stored at the end of the box in classic ** bad ass malloc style. Hence a box is: ** ** --- ** siz_w ** use_w ** user data ** siz_w ** --- ** ** Do not attempt to adjust this structure! */ typedef struct _u3a_box { c3_w siz_w; // size of this box c3_w use_w; // reference count; free if 0 # ifdef U3_MEMORY_DEBUG c3_w eus_w; // recomputed refcount c3_w cod_w; // tracing code # endif } u3a_box; /* u3a_fbox: free node in heap. Sets minimum node size. */ typedef struct _u3a_fbox { u3a_box box_u; u3p(struct _u3a_fbox) pre_p; u3p(struct _u3a_fbox) nex_p; } u3a_fbox; /* u3a_road: contiguous allocation and execution context. */ typedef struct _u3a_road { u3p(struct _u3a_road) par_p; // parent road u3p(struct _u3a_road) kid_p; // child road list u3p(struct _u3a_road) nex_p; // sibling road u3p(c3_w) cap_p; // top of transient region u3p(c3_w) hat_p; // top of durable region u3p(c3_w) mat_p; // bottom of transient region u3p(c3_w) rut_p; // bottom of durable region u3p(c3_w) ear_p; // original cap if kid is live c3_w fut_w[32]; // futureproof buffer struct { // escape buffer union { jmp_buf buf; c3_w buf_w[256]; // futureproofing }; } esc; struct { // miscellaneous config c3_w fag_w; // flag bits } how; // struct { // allocation pools u3p(u3a_fbox) fre_p[u3a_fbox_no]; // heap by node size log u3p(u3a_fbox) cel_p; // custom cell allocator c3_w fre_w; // number of free words #ifdef U3_MEMORY_DEBUG c3_w max_w; // maximum allocated #endif } all; struct { // jet dashboard u3p(u3h_root) har_p; // warm state u3_noun das; // cold state } jed; struct { // namespace u3_noun flu; // (list $+(* (unit))), inward } ski; struct { // trace stack u3_noun tax; // (list ,*) u3_noun mer; // emergency buffer to release } bug; struct { // profile stack c3_d nox_d; // nock steps u3_noun don; // (list batt) u3_noun day; // doss, only in u3H (moveme) } pro; struct { // memoization u3p(u3h_root) har_p; // (map (pair term noun) noun) } cax; } u3a_road; typedef u3a_road u3_road; /* u3a_flag: flags for how.fag_w. All arena related. */ enum u3a_flag { u3a_flag_sand = 0x1, // bump allocation (XX not impl) }; /** Macros. Should be better commented. **/ /* In and out of the box. */ # define u3a_boxed(len_w) (len_w + c3_wiseof(u3a_box) + 1) # define u3a_boxto(box_v) ( (void *) \ ( ((c3_w *)(void*)(box_v)) + \ c3_wiseof(u3a_box) ) ) # define u3a_botox(tox_v) ( (struct _u3a_box *) \ (void *) \ ( ((c3_w *)(void*)(tox_v)) - \ c3_wiseof(u3a_box) ) ) /* Inside a noun. */ # define u3a_is_cat(som) (((som) >> 31) ? c3n : c3y) # define u3a_is_dog(som) (((som) >> 31) ? c3y : c3n) # define u3a_is_pug(som) ((2 == ((som) >> 30)) ? c3y : c3n) # define u3a_is_pom(som) ((3 == ((som) >> 30)) ? c3y : c3n) # define u3a_to_off(som) ((som) & 0x3fffffff) # define u3a_to_ptr(som) (u3a_into(u3a_to_off(som))) # define u3a_to_wtr(som) ((c3_w *)u3a_to_ptr(som)) # define u3a_to_pug(off) (off | 0x80000000) # define u3a_to_pom(off) (off | 0xc0000000) # define u3a_is_atom(som) c3o(u3a_is_cat(som), \ u3a_is_pug(som)) # define u3a_is_cell(som) u3a_is_pom(som) # define u3a_de_twin(dog, dog_w) ((dog & 0xc0000000) | u3a_outa(dog_w)) # define u3a_h(som) \ ( _(u3a_is_cell(som)) \ ? ( ((u3a_cell *)u3a_to_ptr(som))->hed )\ : u3m_bail(c3__exit) ) # define u3a_t(som) \ ( _(u3a_is_cell(som)) \ ? ( ((u3a_cell *)u3a_to_ptr(som))->tel )\ : u3m_bail(c3__exit) ) # define u3a_into(x) ((void *)(u3_Loom + (x))) # define u3a_outa(p) (((c3_w*)(void*)(p)) - u3_Loom) # define u3a_is_north(r) __(r->cap_p > r->hat_p) # define u3a_is_south(r) !u3a_is_north(r) # define u3a_open(r) ( (c3y == u3a_is_north(r)) \ ? (c3_w)(r->cap_p - r->hat_p) \ : (c3_w)(r->hat_p - r->cap_p) ) # define u3a_north_is_senior(r, dog) \ __((u3a_to_off(dog) < r->rut_p) || \ (u3a_to_off(dog) >= r->mat_p)) # define u3a_north_is_junior(r, dog) \ __((u3a_to_off(dog) >= r->cap_p) && \ (u3a_to_off(dog) < r->mat_p)) # define u3a_north_is_normal(r, dog) \ c3a(!(u3a_north_is_senior(r, dog)), \ !(u3a_north_is_junior(r, dog))) # define u3a_south_is_senior(r, dog) \ __((u3a_to_off(dog) < r->mat_p) || \ (u3a_to_off(dog) >= r->rut_p)) # define u3a_south_is_junior(r, dog) \ __((u3a_to_off(dog) < r->cap_p) && \ (u3a_to_off(dog) >= r->mat_p)) # define u3a_south_is_normal(r, dog) \ c3a(!(u3a_south_is_senior(r, dog)), \ !(u3a_south_is_junior(r, dog))) # define u3a_is_junior(r, som) \ ( _(u3a_is_cat(som)) \ ? c3n \ : _(u3a_is_north(r)) \ ? u3a_north_is_junior(r, som) \ : u3a_south_is_junior(r, som) ) # define u3a_is_senior(r, som) \ ( _(u3a_is_cat(som)) \ ? c3y \ : _(u3a_is_north(r)) \ ? u3a_north_is_senior(r, som) \ : u3a_south_is_senior(r, som) ) /** Globals. **/ /* u3_Road / u3R: current road (thread-local). */ c3_global u3_road* u3a_Road; # define u3R u3a_Road /* u3_Code: memory code. */ #ifdef U3_MEMORY_DEBUG c3_global c3_w u3_Code; #endif # define u3_Loom ((c3_w *)(void *)U3_OS_LoomBase) /** Functions. **/ /** Allocation. **/ /* Word-aligned allocation. */ /* u3a_walloc(): allocate storage measured in words. */ void* u3a_walloc(c3_w len_w); /* u3a_celloc(): allocate a cell. Faster, sometimes. */ c3_w* u3a_celloc(void); /* u3a_wfree(): free storage. */ void u3a_wfree(void* lag_v); /* u3a_wealloc(): word realloc. */ void* u3a_wealloc(void* lag_v, c3_w len_w); /* C-style aligned allocation - *not* compatible with above. */ /* u3a_malloc(): aligned storage measured in bytes. */ void* u3a_malloc(size_t len_i); /* u3a_calloc(): aligned storage measured in bytes. */ void* u3a_calloc(size_t num_i, size_t len_i); /* u3a_realloc(): aligned realloc in bytes. */ void* u3a_realloc(void* lag_v, size_t len_i); /* u3a_realloc2(): gmp-shaped realloc. */ void* u3a_realloc2(void* lag_v, size_t old_i, size_t new_i); /* u3a_free(): free for aligned malloc. */ void u3a_free(void* tox_v); /* u3a_free2(): gmp-shaped free. */ void u3a_free2(void* tox_v, size_t siz_i); /* Reference and arena control. */ /* u3a_gain(): gain a reference count in normal space. */ u3_weak u3a_gain(u3_weak som); /* u3a_take(): gain, copying juniors. */ u3_noun u3a_take(u3_noun som); /* u3a_left(): true of junior if preserved. */ c3_o u3a_left(u3_noun som); /* u3a_lose(): lose a reference. */ void u3a_lose(u3_weak som); /* u3a_wash(): wash all lazy mugs in subtree. RETAIN. */ void u3a_wash(u3_noun som); /* u3a_use(): reference count. */ c3_w u3a_use(u3_noun som); /* u3a_luse(): check refcount sanity. */ void u3a_luse(u3_noun som); /* u3a_mark_ptr(): mark a pointer for gc. Produce size. */ c3_w u3a_mark_ptr(void* ptr_v); /* u3a_mark_mptr(): mark a u3_malloc-allocated ptr for gc. */ c3_w u3a_mark_mptr(void* ptr_v); /* u3a_mark_noun(): mark a noun for gc. Produce size. */ c3_w u3a_mark_noun(u3_noun som); /* u3a_sweep(): sweep a fully marked road. */ c3_w u3a_sweep(void); /* u3a_sane(): check allocator sanity. */ void u3a_sane(void); /* u3a_lush(): leak push. */ c3_w u3a_lush(c3_w lab_w); /* u3a_lop(): leak pop. */ void u3a_lop(c3_w lab_w); /* u3a_print_memory: print memory amount. */ void u3a_print_memory(c3_c* cap_c, c3_w wor_w); /* Atoms from proto-atoms. */ /* u3a_slab(): create a length-bounded proto-atom. */ c3_w* u3a_slab(c3_w len_w); /* u3a_slaq(): u3a_slab() with a defined blocksize. */ c3_w* u3a_slaq(c3_g met_g, c3_w len_w); /* u3a_malt(): measure and finish a proto-atom. */ u3_noun u3a_malt(c3_w* sal_w); /* u3a_moot(): finish a pre-measured proto-atom; dangerous. */ u3_noun u3a_moot(c3_w* sal_w); /* u3a_mint(): finish a measured proto-atom. */ u3_noun u3a_mint(c3_w* sal_w, c3_w len_w);