uCBQN/src/opt/mm_buddyTemplate.c
2023-03-04 20:09:12 +02:00

202 lines
4.9 KiB
C

#include "../utils/file.h"
#include "../utils/interrupt.h"
#define AllocInfo BN(AllocInfo)
#define buckets BN(buckets)
#define al BN(al)
#define alCap BN(alCap)
#define alSize BN(alSize)
#ifndef MMAP
usz getPageSize(void);
#define MMAP(SZ) mmap(NULL, (SZ)+getPageSize(), PROT_READ|PROT_WRITE, MAP_NORESERVE|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
#endif
#define str0(X) #X
#define str1(X) str0(X)
typedef struct AllocInfo {
Value* p;
u64 sz;
} AllocInfo;
AllocInfo* al;
u64 alCap;
u64 alSize;
FORCE_INLINE void BN(splitTo)(EmptyValue* c, i64 from, i64 to, bool notEqual) {
c->mmInfo = MMI(to);
PLAINLOOP while (from != to) {
from--;
EmptyValue* b = (EmptyValue*) (BSZ(from) + (u8*)c);
b->type = t_empty;
b->mmInfo = MMI(from);
b->next = buckets[from];
vg_undef_p(b, sizeof(EmptyValue));
buckets[from] = b;
}
c->next = buckets[from];
vg_undef_p(c, sizeof(EmptyValue));
buckets[from] = c;
}
#if GC_VISIT_V2 && !BUDDY_NO_GC
static bool BN(allocMore_rec);
#endif
static NOINLINE void* BN(allocateMore)(i64 bucket, u8 type, i64 from, i64 to) {
u64 sz = BSZ(from);
CHECK_INTERRUPT;
#if GC_VISIT_V2 && !BUDDY_NO_GC
if (gc_maybeGC(false)) goto alloc_rec;
#endif
if (mm_heapAlloc+sz >= mm_heapMax) {
#if GC_VISIT_V2 && !BUDDY_NO_GC
if (!BN(allocMore_rec)) {
gc_forceGC(false);
BN(allocMore_rec) = true;
alloc_rec:;
void* r = BN(allocL)(bucket, type);
BN(allocMore_rec) = false;
return r;
}
BN(allocMore_rec) = false;
gc_wantTopLevelGC = true;
#endif
thrOOM();
}
#if NO_MMAP
EmptyValue* c = calloc(sz+getPageSize(), 1);
#else
EmptyValue* c = MMAP(sz);
if (c==MAP_FAILED) thrOOM();
#endif
mm_heapAlloc+= sz;
#if LOG_GC || LOG_MM_MORE
fprintf(stderr, "allocating "N64u" more " str1(BN()) " heap (from allocation of "N64u"B/bucket %d)\n", sz, (u64)BSZ(bucket), (int)bucket);
#endif
if (alSize+1>=alCap) {
alCap = alCap? alCap*2 : 1024;
al = realloc(al, sizeof(AllocInfo)*alCap);
}
al[BN(alSize)++] = (AllocInfo){.p = (Value*)c, .sz = sz};
c->type = t_empty;
c->mmInfo = from;
c->next = 0;
vg_undef_p(c, sz);
BN(splitTo)(c, from, to, false);
assert(buckets[bucket]!=NULL);
return BN(allocL)(bucket, type);
}
NOINLINE void* BN(allocS)(i64 bucket, u8 type) {
i64 to = bucket&63;
i64 from = to;
EmptyValue* c;
while (true) {
if (from >= ALSZ) return BN(allocateMore)(bucket, type, from, to);
from++;
if (buckets[from]) {
c = buckets[from];
assert((vg_def_v(c->mmInfo)&63)==from);
buckets[from] = vg_def_v(c->next);
break;
}
}
BN(splitTo)(c, from, to, true);
assert(buckets[bucket]!=NULL);
return BN(allocL)(bucket, type);
}
void BN(forHeap)(V2v f) {
for (u64 i = 0; i < alSize; i++) {
AllocInfo ci = al[i];
Value* s = ci.p;
Value* e = (Value*)(ci.sz + (u8*)ci.p);
while (s!=e) {
if (vg_def_v(s->type)!=t_empty) f(s);
s = (Value*)(BSZ(vg_def_v(s->mmInfo)&63) + (u8*)s);
}
}
}
void BN(forFreedHeap)(V2v f) {
for (u64 i = 0; i < alSize; i++) {
AllocInfo ci = al[i];
Value* s = ci.p;
Value* e = (Value*)(ci.sz + (u8*)ci.p);
while (s!=e) {
if (vg_def_v(s->type)==t_empty) f(s);
s = (Value*)(BSZ(vg_def_v(s->mmInfo)&63) + (u8*)s);
}
}
}
static void BN(freeFreedAndMerge)() {
for (u64 i = 0; i < 64; i++) buckets[i] = NULL;
for (u64 i = 0; i < alSize; i++) {
AllocInfo ci = al[i];
u64 emptySize = 0;
Value* c = ci.p;
Value* e = (Value*)(ci.sz + (u8*)ci.p);
assert(c!=e);
while (true) {
if (vg_def_v(c->type)==t_freed) BN(freeLink)(c, false);
Value* next = (Value*)(BSZ(vg_def_v(c->mmInfo)&63) + (u8*)c);
if (vg_def_v(c->type)==t_empty) {
emptySize+= 1ULL<<(vg_def_v(c->mmInfo)&63);
} else if (emptySize > 0) {
emptyTail:;
u8* emptyStart = ((u8*)c) - emptySize*MUL;
while(emptySize) {
u64 left = emptySize & (emptySize-1);
u64 curr = emptySize ^ left;
EmptyValue* cv = (EmptyValue*)emptyStart;
u64 b = 63-CLZ(curr);
*cv = (EmptyValue){
.type = 0,
.mmInfo = MMI(b),
.next = buckets[b]
};
buckets[b] = cv;
emptyStart+= curr*MUL;
emptySize = left;
}
emptySize = 0;
}
c = next;
if (c==e) {
if (emptySize!=0) goto emptyTail;
break;
}
}
}
}
void writeNum(FILE* f, u64 v, i32 len);
void BN(dumpHeap)(FILE* f) {
for (u64 i = 0; i < alSize; i++) {
AllocInfo ci = al[i];
u64 addrI = ptr2u64(ci.p);
writeNum(f, ci.sz, 8);
writeNum(f, addrI, 8);
char* prefix = str1(BN());
fwrite(prefix, 1, strlen(prefix)+1, f);
fwrite(ci.p, 1, ci.sz, f);
}
fflush(f);
}
#undef MMAP
#undef AllocInfo
#undef buckets
#undef al
#undef alSize
#undef alCap
#undef MMI
#undef MUL
#undef ALSZ