本次采用完全二叉树Complete Binary Tree的形式实现堆。 堆(heap)是一类特殊的数据结构的统称,堆通常是一个可以被看做一棵树的数组对象。堆总是满足下列性质: 堆中某个结点的值总是不大于或不小于其父结点的值; 堆总是一棵完全二叉树。 堆的主要特点为:它的父结点必然是小于或等于左右子结点(...
MHeap管理的内存基本单元为HeapArena,HeapArena是对多个"Page"的抽象,在Linux 64位的操作系统上,每一个HeapArena占用64MB的内存,每一个HeapArena包含多个Page,每个Page由不同的mSpan来管理。MHeap中,根据“arens”属性对HeapArena进行定义和管理。从下图mheap定义中,还有几个关键属性需要关注 central属性:根据该属性可以...
e := add(unsafe.Pointer(b), dataOffset+bucketCnt*uintptr(t.keysize)+i*uintptr(t.elemsize))ift.indirectelem() { *(*unsafe.Pointer)(e) =nil}elseift.elem.ptrdata !=0{ memclrHasPointers(e, t.elem.size) }else{ memclrNoHeapPointers(e, t.elem.size) } b.tophash[i] = emptyOne/...
// The allocation is always aligned to the heap arena // size which is always > physPageSize, so its safe to // just add directly to heap_released. mSysStatInc(&memstats.heap_released, asize) mSysStatInc(&memstats.heap_idle, asize) // Recalculate nBase. // We know this won't ov...
BinaryHeap yes yes* no index Queues LinkedListQueue yes yes no index ArrayQueue yes yes* no index CircularBuffer yes yes* no index PriorityQueue yes yes* no index *reversible *bidirectional 5. Gin Web Framework 代码语言:txt 复制 代码语言:javascript 代码运行次数:0 运行 AI代码解释 Gin是一个用...
// linker-allocated, not heap-allocated. // // Note that because finalizers may execute arbitrarily far into the future // after an object is no longer referenced, the runtime is allowed to perform // a space-saving optimization that batches objects together in a single ...
// The hiter struct pointed to by 'it' is allocated on the stack // by the compilers order pass or on the heap by reflect_mapiterinit. // Both need to have zeroed hiter since the struct contains pointers. func mapiterinit(t *maptype, h *hmap, it *hiter) { // ... // ...
dataOffset = unsafe.Offsetof(struct { b bmap v int64 }{}.v) 桶里key 的起始地址是:unsafe.Pointer(b) + dataOffset; 第i 个 key 的地址就要在此基础上跨过 i 个 key 的大小; value 的地址是在所有 key 之后,因此第 i 个 value 的地址还需要加上所有 key 的偏移。
// Add a timer to the heap and start or kick timerproc if the new timer is// earlier than any of the others.// Timers are locked.// Returns whether all is well: false if the data structure is corrupt// due to user-level races.func (tb *timersBucket) addtimerLocked(t *timer) bo...
scanAlloc uintptr // bytes of scannable heap allocated // 小对象缓存,<16b。推荐阅读"Tiny allocator"注释文档 tiny uintptr tinyoffset uintptr tinyAllocs uintptr // 下方成员不会在每次 malloc 时被访问 alloc [numSpanClasses]*mspan // spans to allocate from, indexed by spanClass ...