92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
#define AllocInfo BN(AllocInfo)
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#define buckets BN(buckets)
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#define al BN(al)
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#define alCap BN(alCap)
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#define alSize BN(alSize)
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#define str(X) #X
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#ifndef PROT
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#define PROT PROT_READ|PROT_WRITE
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#endif
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#ifndef FLAGS
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#define FLAGS MAP_NORESERVE|MAP_PRIVATE|MAP_ANON
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#endif
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typedef struct AllocInfo {
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Value* p;
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u64 sz;
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} AllocInfo;
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AllocInfo* al;
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u64 alCap;
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u64 alSize;
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static inline void BN(guaranteeEmpty)(u8 bucket) {
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u8 cb = bucket;
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EmptyValue* c;
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while (true) {
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cb++;
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if (buckets[cb]) {
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c = buckets[cb];
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assert((c->mmInfo&63)==cb);
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buckets[cb] = c->next;
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break;
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}
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if (cb >= ALSZ) {
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u64 sz = BSZ(cb);
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if (mm_heapAlloc+sz >= mm_heapMax) { printf("Heap size limit reached\n"); exit(1); }
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mm_heapAlloc+= sz;
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// gc_maybeGC();
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c = mmap(NULL, sz, PROT, FLAGS, -1, 0);
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#ifdef USE_VALGRIND
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VALGRIND_MAKE_MEM_UNDEFINED(c, sz);
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#endif
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if (alSize+1>=alCap) {
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alCap = alCap? alCap*2 : 1024;
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al = realloc(al, sizeof(AllocInfo)*alCap);
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}
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al[BN(alSize)++] = (AllocInfo){.p = (Value*)c, .sz = sz};
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if (c==MAP_FAILED) { printf("Failed to allocate memory\n"); exit(1); }
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c->type = t_empty;
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c->mmInfo = cb;
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c->next = 0;
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break;
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}
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}
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c->mmInfo = MMI(bucket);
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while (cb != bucket) {
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cb--;
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EmptyValue* b = (EmptyValue*) (BSZ(cb) + (u8*)c);
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b->type = t_empty;
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b->mmInfo = MMI(cb);
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b->next = buckets[cb];
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buckets[cb] = b;
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}
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c->next = buckets[cb];
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buckets[cb] = c;
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}
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NOINLINE void* BN(allocS)(i64 bucket, u8 type) {
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BN(guaranteeEmpty)(bucket&63);
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return BN(allocL)(bucket, type);
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}
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void BN(forHeap)(V2v f) {
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for (u64 i = 0; i < alSize; i++) {
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AllocInfo ci = al[i];
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Value* s = ci.p;
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Value* e = (Value*)(ci.sz + (u8*)ci.p);
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while (s!=e) {
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if (s->type!=t_empty) f(s);
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s = (Value*)(BSZ(s->mmInfo&63) + (u8*)s);
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}
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}
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}
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#undef FLAGS
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#undef PROT
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#undef AllocInfo
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#undef buckets
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#undef al
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#undef alSize
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#undef alCap
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#undef MMI
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#undef ALSZ
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