604 lines
14 KiB
C
604 lines
14 KiB
C
/*
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* $Id: mem.c 337 2008-08-20 09:17:25Z baconevi $
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*
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* {License}
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*/
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#include "lsp.h"
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ase_lsp_mem_t* ase_lsp_openmem (
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ase_lsp_t* lsp, ase_size_t ubound, ase_size_t ubound_inc)
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{
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ase_lsp_mem_t* mem;
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ase_size_t i;
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/* allocate memory */
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mem = (ase_lsp_mem_t*) ASE_LSP_ALLOC (lsp, ASE_SIZEOF(ase_lsp_mem_t));
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if (mem == ASE_NULL) return ASE_NULL;
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ASE_MEMSET (mem, 0, ASE_SIZEOF(ase_lsp_mem_t));
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mem->lsp = lsp;
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/* create a new root environment frame */
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mem->frame = ase_lsp_newframe (lsp);
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if (mem->frame == ASE_NULL)
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{
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ASE_LSP_FREE (lsp, mem);
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return ASE_NULL;
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}
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mem->root_frame = mem->frame;
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mem->brooding_frame = ASE_NULL;
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mem->tlink = ASE_NULL;
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mem->tlink_count = 0;
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/* initialize object allocation list */
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mem->ubound = ubound;
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mem->ubound_inc = ubound_inc;
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mem->count = 0;
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for (i = 0; i < ASE_LSP_TYPE_COUNT; i++)
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{
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mem->used[i] = ASE_NULL;
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mem->free[i] = ASE_NULL;
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}
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mem->read = ASE_NULL;
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/* when "ubound" is too small, the garbage collection can
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* be performed while making the common objects. */
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mem->nil = ASE_NULL;
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mem->t = ASE_NULL;
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mem->quote = ASE_NULL;
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mem->lambda = ASE_NULL;
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mem->macro = ASE_NULL;
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/* initialize common object pointers */
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mem->nil = ase_lsp_makenil (mem);
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mem->t = ase_lsp_maketrue (mem);
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mem->quote = ase_lsp_makesym (mem, ASE_T("quote"), 5);
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mem->lambda = ase_lsp_makesym (mem, ASE_T("lambda"), 6);
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mem->macro = ase_lsp_makesym (mem, ASE_T("macro"), 5);
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if (mem->nil == ASE_NULL ||
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mem->t == ASE_NULL ||
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mem->quote == ASE_NULL ||
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mem->lambda == ASE_NULL ||
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mem->macro == ASE_NULL)
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{
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ase_lsp_dispose_all (mem);
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ase_lsp_freeframe (lsp, mem->frame);
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ASE_LSP_FREE (lsp, mem);
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return ASE_NULL;
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}
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ASE_LSP_PERM(mem->nil) = 1;
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ASE_LSP_PERM(mem->t) = 1;
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ASE_LSP_PERM(mem->quote) = 1;
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ASE_LSP_PERM(mem->lambda) = 1;
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ASE_LSP_PERM(mem->macro) = 1;
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return mem;
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}
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void ase_lsp_closemem (ase_lsp_mem_t* mem)
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{
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/* dispose of the allocated objects */
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ase_lsp_dispose_all (mem);
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/* dispose of environment frames */
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ase_lsp_freeframe (mem->lsp, mem->frame);
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/* free the memory */
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ASE_LSP_FREE (mem->lsp, mem);
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}
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ase_lsp_obj_t* ase_lsp_alloc (ase_lsp_mem_t* mem, int type, ase_size_t size)
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{
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ase_lsp_obj_t* obj;
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/* TODO: remove the following line... */
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ase_lsp_gc (mem);
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if (mem->count >= mem->ubound) ase_lsp_gc (mem);
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if (mem->count >= mem->ubound)
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{
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mem->ubound += mem->ubound_inc;
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if (mem->count >= mem->ubound) return ASE_NULL;
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}
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obj = (ase_lsp_obj_t*) ASE_LSP_ALLOC (mem->lsp, size);
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if (obj == ASE_NULL)
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{
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ase_lsp_gc (mem);
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obj = (ase_lsp_obj_t*) ASE_LSP_ALLOC (mem->lsp, size);
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if (obj == ASE_NULL)
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{
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ase_lsp_seterror (mem->lsp, ASE_LSP_ENOMEM, ASE_NULL, 0);
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return ASE_NULL;
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}
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}
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ASE_LSP_TYPE(obj) = type;
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ASE_LSP_SIZE(obj) = size;
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ASE_LSP_MARK(obj) = 0;
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ASE_LSP_PERM(obj) = 0;
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ASE_LSP_LOCK(obj) = 0;
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/* insert the object at the head of the used list */
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ASE_LSP_LINK(obj) = mem->used[type];
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mem->used[type] = obj;
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mem->count++;
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#if 0
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ase_dprint1 (ASE_T("mem->count: %u\n"), mem->count);
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#endif
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return obj;
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}
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void ase_lsp_dispose (
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ase_lsp_mem_t* mem, ase_lsp_obj_t* prev, ase_lsp_obj_t* obj)
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{
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ASE_ASSERT (obj != ASE_NULL);
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ASE_ASSERT (mem->count > 0);
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/* TODO: push the object to the free list for more
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* efficient memory management */
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if (prev == ASE_NULL)
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mem->used[ASE_LSP_TYPE(obj)] = ASE_LSP_LINK(obj);
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else ASE_LSP_LINK(prev) = ASE_LSP_LINK(obj);
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mem->count--;
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#if 0
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ase_dprint1 (ASE_T("mem->count: %u\n"), mem->count);
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#endif
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ASE_LSP_FREE (mem->lsp, obj);
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}
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void ase_lsp_dispose_all (ase_lsp_mem_t* mem)
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{
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ase_lsp_obj_t* obj, * next;
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ase_size_t i;
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for (i = 0; i < ASE_LSP_TYPE_COUNT; i++)
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{
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obj = mem->used[i];
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while (obj != ASE_NULL)
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{
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next = ASE_LSP_LINK(obj);
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ase_lsp_dispose (mem, ASE_NULL, obj);
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obj = next;
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}
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}
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}
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static void __mark_obj (ase_lsp_t* lsp, ase_lsp_obj_t* obj)
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{
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ASE_ASSERT (obj != ASE_NULL);
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/* TODO: can it be recursive? */
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if (ASE_LSP_MARK(obj) != 0) return;
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ASE_LSP_MARK(obj) = 1;
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if (ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_CONS)
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{
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__mark_obj (lsp, ASE_LSP_CAR(obj));
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__mark_obj (lsp, ASE_LSP_CDR(obj));
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}
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else if (ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_FUNC)
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{
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__mark_obj (lsp, ASE_LSP_FFORMAL(obj));
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__mark_obj (lsp, ASE_LSP_FBODY(obj));
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}
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else if (ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_MACRO)
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{
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__mark_obj (lsp, ASE_LSP_MFORMAL(obj));
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__mark_obj (lsp, ASE_LSP_MBODY(obj));
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}
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}
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/*
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* ase_lsp_lockobj and ase_lsp_deepunlockobj are just called by ase_lsp_read.
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*/
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void ase_lsp_lockobj (ase_lsp_t* lsp, ase_lsp_obj_t* obj)
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{
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ASE_ASSERTX (obj != ASE_NULL,
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"an object pointer should not be ASE_NULL");
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if (ASE_LSP_PERM(obj) == 0) ASE_LSP_LOCK(obj)++;
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}
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void ase_lsp_unlockobj (ase_lsp_t* lsp, ase_lsp_obj_t* obj)
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{
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ASE_ASSERTX (obj != ASE_NULL,
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"an object pointer should not be ASE_NULL");
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if (ASE_LSP_PERM(obj) != 0) return;
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ASE_ASSERTX (ASE_LSP_LOCK(obj) > 0,
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"the lock count should be greater than zero to be unlocked");
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ASE_LSP_LOCK(obj)--;
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}
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void ase_lsp_deepunlockobj (ase_lsp_t* lsp, ase_lsp_obj_t* obj)
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{
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ASE_ASSERTX (obj != ASE_NULL,
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"an object pointer should not be ASE_NULL");
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if (ASE_LSP_PERM(obj) == 0)
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{
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ASE_ASSERTX (ASE_LSP_LOCK(obj) > 0,
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"the lock count should be greater than zero to be unlocked");
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ASE_LSP_LOCK(obj)--;
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}
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if (ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_CONS)
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{
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ase_lsp_deepunlockobj (lsp, ASE_LSP_CAR(obj));
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ase_lsp_deepunlockobj (lsp, ASE_LSP_CDR(obj));
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}
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else if (ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_FUNC)
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{
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ase_lsp_deepunlockobj (lsp, ASE_LSP_FFORMAL(obj));
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ase_lsp_deepunlockobj (lsp, ASE_LSP_FBODY(obj));
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}
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else if (ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_MACRO)
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{
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ase_lsp_deepunlockobj (lsp, ASE_LSP_MFORMAL(obj));
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ase_lsp_deepunlockobj (lsp, ASE_LSP_MBODY(obj));
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}
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}
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static void __mark_objs_in_use (ase_lsp_mem_t* mem)
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{
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ase_lsp_frame_t* frame;
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ase_lsp_assoc_t* assoc;
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ase_lsp_tlink_t* tlink;
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/*ase_lsp_arr_t* arr;*/
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/*ase_size_t i;*/
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#if 0
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ase_dprint0 (ASE_T("marking environment frames\n"));
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#endif
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/* mark objects in the environment frames */
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frame = mem->frame;
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while (frame != ASE_NULL)
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{
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assoc = frame->assoc;
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while (assoc != ASE_NULL)
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{
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__mark_obj (mem->lsp, assoc->name);
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if (assoc->value != ASE_NULL)
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__mark_obj (mem->lsp, assoc->value);
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if (assoc->func != ASE_NULL)
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__mark_obj (mem->lsp, assoc->func);
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assoc = assoc->link;
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}
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frame = frame->link;
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}
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#if 0
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ase_dprint0 (ASE_T("marking interim frames\n"));
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#endif
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/* mark objects in the interim frames */
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frame = mem->brooding_frame;
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while (frame != ASE_NULL)
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{
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assoc = frame->assoc;
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while (assoc != ASE_NULL)
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{
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__mark_obj (mem->lsp, assoc->name);
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if (assoc->value != ASE_NULL)
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__mark_obj (mem->lsp, assoc->value);
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if (assoc->func != ASE_NULL)
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__mark_obj (mem->lsp, assoc->func);
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assoc = assoc->link;
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}
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frame = frame->link;
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}
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/* ase_dprint0 (ASE_T("marking the read object\n"));*/
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if (mem->read != ASE_NULL) __mark_obj (mem->lsp, mem->read);
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/* ase_dprint0 (ASE_T("marking the temporary objects\n"));*/
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for (tlink = mem->tlink; tlink != ASE_NULL; tlink = tlink->link)
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{
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__mark_obj (mem->lsp, tlink->obj);
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}
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#if 0
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ase_dprint0 (ASE_T("marking builtin objects\n"));
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#endif
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/* mark common objects */
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if (mem->t != ASE_NULL) __mark_obj (mem->lsp, mem->t);
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if (mem->nil != ASE_NULL) __mark_obj (mem->lsp, mem->nil);
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if (mem->quote != ASE_NULL) __mark_obj (mem->lsp, mem->quote);
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if (mem->lambda != ASE_NULL) __mark_obj (mem->lsp, mem->lambda);
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if (mem->macro != ASE_NULL) __mark_obj (mem->lsp, mem->macro);
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}
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//#include <ase/utl/stdio.h>
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static void __sweep_unmarked_objs (ase_lsp_mem_t* mem)
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{
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ase_lsp_obj_t* obj, * prev, * next;
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ase_size_t i;
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/* scan all the allocated objects and get rid of unused objects */
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for (i = 0; i < ASE_LSP_TYPE_COUNT; i++)
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{
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prev = ASE_NULL;
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obj = mem->used[i];
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#if 0
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ase_dprint1 (ASE_T("sweeping objects of type: %u\n"), i);
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#endif
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while (obj != ASE_NULL)
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{
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next = ASE_LSP_LINK(obj);
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if (ASE_LSP_LOCK(obj) == 0 &&
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ASE_LSP_MARK(obj) == 0 &&
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ASE_LSP_PERM(obj) == 0)
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{
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/* dispose of unused objects */
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/*
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if (i == ASE_LSP_OBJ_INT)
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ase_printf (ASE_T("disposing....%d [%d]\n"), i, (int)ASE_LSP_IVAL(obj));
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if (i == ASE_LSP_OBJ_REAL)
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ase_printf (ASE_T("disposing....%d [%Lf]\n"), i, (double)ASE_LSP_RVAL(obj));
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else if (i == ASE_LSP_OBJ_SYM)
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ase_printf (ASE_T("disposing....%d [%s]\n"), i, ASE_LSP_SYMPTR(obj));
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else if (i == ASE_LSP_OBJ_STR)
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ase_printf (ASE_T("disposing....%d [%s]\n"), i, ASE_LSP_STRPTR(obj));
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else
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ase_printf (ASE_T("disposing....%d\n"), i);
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*/
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ase_lsp_dispose (mem, prev, obj);
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}
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else
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{
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/* unmark the object in use */
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ASE_LSP_MARK(obj) = 0;
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prev = obj;
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}
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obj = next;
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}
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}
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}
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void ase_lsp_gc (ase_lsp_mem_t* mem)
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{
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__mark_objs_in_use (mem);
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__sweep_unmarked_objs (mem);
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}
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ase_lsp_obj_t* ase_lsp_makenil (ase_lsp_mem_t* mem)
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{
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if (mem->nil != ASE_NULL) return mem->nil;
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mem->nil = ase_lsp_alloc (
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mem, ASE_LSP_OBJ_NIL, ASE_SIZEOF(ase_lsp_obj_nil_t));
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return mem->nil;
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}
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ase_lsp_obj_t* ase_lsp_maketrue (ase_lsp_mem_t* mem)
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{
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if (mem->t != ASE_NULL) return mem->t;
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mem->t = ase_lsp_alloc (
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mem, ASE_LSP_OBJ_TRUE, ASE_SIZEOF(ase_lsp_obj_true_t));
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return mem->t;
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}
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ase_lsp_obj_t* ase_lsp_makeintobj (ase_lsp_mem_t* mem, ase_long_t value)
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{
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ase_lsp_obj_t* obj;
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obj = ase_lsp_alloc (mem,
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ASE_LSP_OBJ_INT, ASE_SIZEOF(ase_lsp_obj_int_t));
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if (obj == ASE_NULL) return ASE_NULL;
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ASE_LSP_IVAL(obj) = value;
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return obj;
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}
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ase_lsp_obj_t* ase_lsp_makerealobj (ase_lsp_mem_t* mem, ase_real_t value)
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{
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ase_lsp_obj_t* obj;
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obj = ase_lsp_alloc (mem,
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ASE_LSP_OBJ_REAL, ASE_SIZEOF(ase_lsp_obj_real_t));
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if (obj == ASE_NULL) return ASE_NULL;
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ASE_LSP_RVAL(obj) = value;
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return obj;
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}
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ase_lsp_obj_t* ase_lsp_makesym (
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ase_lsp_mem_t* mem, const ase_char_t* str, ase_size_t len)
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{
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ase_lsp_obj_t* obj;
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/* look for a sysmbol with the given name */
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obj = mem->used[ASE_LSP_OBJ_SYM];
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while (obj != ASE_NULL)
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{
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/* if there is a symbol with the same name, it is just used. */
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if (ase_strxncmp (
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ASE_LSP_SYMPTR(obj),
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ASE_LSP_SYMLEN(obj),
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str, len) == 0) return obj;
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obj = ASE_LSP_LINK(obj);
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}
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/* no such symbol found. create a new one */
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obj = ase_lsp_alloc (mem, ASE_LSP_OBJ_SYM,
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ASE_SIZEOF(ase_lsp_obj_sym_t)+(len + 1)*ASE_SIZEOF(ase_char_t));
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if (obj == ASE_NULL) return ASE_NULL;
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/* fill in the symbol buffer */
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ase_strncpy (ASE_LSP_SYMPTR(obj), str, len);
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return obj;
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}
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ase_lsp_obj_t* ase_lsp_makestr (
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ase_lsp_mem_t* mem, const ase_char_t* str, ase_size_t len)
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{
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ase_lsp_obj_t* obj;
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/* allocate memory for the string */
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obj = ase_lsp_alloc (mem, ASE_LSP_OBJ_STR,
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ASE_SIZEOF(ase_lsp_obj_str_t)+(len + 1)*ASE_SIZEOF(ase_char_t));
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if (obj == ASE_NULL) return ASE_NULL;
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/* fill in the string buffer */
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ase_strncpy (ASE_LSP_STRPTR(obj), str, len);
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return obj;
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}
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ase_lsp_obj_t* ase_lsp_makecons (
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ase_lsp_mem_t* mem, ase_lsp_obj_t* car, ase_lsp_obj_t* cdr)
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{
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ase_lsp_obj_t* obj;
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obj = ase_lsp_alloc (mem,
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ASE_LSP_OBJ_CONS, ASE_SIZEOF(ase_lsp_obj_cons_t));
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if (obj == ASE_NULL) return ASE_NULL;
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ASE_LSP_CAR(obj) = car;
|
|
ASE_LSP_CDR(obj) = cdr;
|
|
|
|
return obj;
|
|
}
|
|
|
|
ase_lsp_obj_t* ase_lsp_makefunc (
|
|
ase_lsp_mem_t* mem, ase_lsp_obj_t* formal, ase_lsp_obj_t* body)
|
|
{
|
|
ase_lsp_obj_t* obj;
|
|
|
|
obj = ase_lsp_alloc (mem,
|
|
ASE_LSP_OBJ_FUNC, ASE_SIZEOF(ase_lsp_obj_func_t));
|
|
if (obj == ASE_NULL) return ASE_NULL;
|
|
|
|
ASE_LSP_FFORMAL(obj) = formal;
|
|
ASE_LSP_FBODY(obj) = body;
|
|
|
|
return obj;
|
|
}
|
|
|
|
ase_lsp_obj_t* ase_lsp_makemacro (
|
|
ase_lsp_mem_t* mem, ase_lsp_obj_t* formal, ase_lsp_obj_t* body)
|
|
{
|
|
ase_lsp_obj_t* obj;
|
|
|
|
obj = ase_lsp_alloc (mem,
|
|
ASE_LSP_OBJ_MACRO, ASE_SIZEOF(ase_lsp_obj_macro_t));
|
|
if (obj == ASE_NULL) return ASE_NULL;
|
|
|
|
ASE_LSP_MFORMAL(obj) = formal;
|
|
ASE_LSP_MBODY(obj) = body;
|
|
|
|
return obj;
|
|
}
|
|
|
|
ase_lsp_obj_t* ase_lsp_makeprim (ase_lsp_mem_t* mem,
|
|
ase_lsp_prim_t impl, ase_size_t min_args, ase_size_t max_args)
|
|
{
|
|
ase_lsp_obj_t* obj;
|
|
|
|
obj = ase_lsp_alloc (
|
|
mem, ASE_LSP_OBJ_PRIM, ASE_SIZEOF(ase_lsp_obj_prim_t));
|
|
if (obj == ASE_NULL) return ASE_NULL;
|
|
|
|
ASE_LSP_PIMPL(obj) = impl;
|
|
ASE_LSP_PMINARGS(obj) = min_args;
|
|
ASE_LSP_PMAXARGS(obj) = max_args;
|
|
return obj;
|
|
}
|
|
|
|
ase_lsp_assoc_t* ase_lsp_lookup (ase_lsp_mem_t* mem, ase_lsp_obj_t* name)
|
|
{
|
|
ase_lsp_frame_t* frame;
|
|
ase_lsp_assoc_t* assoc;
|
|
|
|
ASE_ASSERT (ASE_LSP_TYPE(name) == ASE_LSP_OBJ_SYM);
|
|
|
|
frame = mem->frame;
|
|
|
|
while (frame != ASE_NULL)
|
|
{
|
|
assoc = ase_lsp_lookupinframe (mem->lsp, frame, name);
|
|
if (assoc != ASE_NULL) return assoc;
|
|
frame = frame->link;
|
|
}
|
|
|
|
return ASE_NULL;
|
|
}
|
|
|
|
ase_lsp_assoc_t* ase_lsp_setvalue (
|
|
ase_lsp_mem_t* mem, ase_lsp_obj_t* name, ase_lsp_obj_t* value)
|
|
{
|
|
ase_lsp_assoc_t* assoc;
|
|
|
|
assoc = ase_lsp_lookup (mem, name);
|
|
if (assoc == ASE_NULL)
|
|
{
|
|
assoc = ase_lsp_insvalueintoframe (
|
|
mem->lsp, mem->root_frame, name, value);
|
|
if (assoc == ASE_NULL) return ASE_NULL;
|
|
}
|
|
else assoc->value = value;
|
|
|
|
return assoc;
|
|
}
|
|
|
|
ase_lsp_assoc_t* ase_lsp_setfunc (
|
|
ase_lsp_mem_t* mem, ase_lsp_obj_t* name, ase_lsp_obj_t* func)
|
|
{
|
|
ase_lsp_assoc_t* assoc;
|
|
|
|
assoc = ase_lsp_lookup (mem, name);
|
|
if (assoc == ASE_NULL)
|
|
{
|
|
assoc = ase_lsp_insfuncintoframe (
|
|
mem->lsp, mem->root_frame, name, func);
|
|
if (assoc == ASE_NULL) return ASE_NULL;
|
|
}
|
|
else assoc->func = func;
|
|
|
|
return assoc;
|
|
}
|
|
|
|
ase_size_t ase_lsp_conslen (ase_lsp_mem_t* mem, ase_lsp_obj_t* obj)
|
|
{
|
|
ase_size_t count;
|
|
|
|
ASE_ASSERT (
|
|
obj == mem->nil || ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_CONS);
|
|
|
|
count = 0;
|
|
/*while (obj != mem->nil) {*/
|
|
while (ASE_LSP_TYPE(obj) == ASE_LSP_OBJ_CONS)
|
|
{
|
|
count++;
|
|
obj = ASE_LSP_CDR(obj);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
|