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server-skynet-source-3rd-je.../include/jemalloc/internal/ph.h

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Clean up some minor data structure inconsistencies Namely, unify the include guard styling with the majority of the project, and do flat_bitmap -> fb, to match its naming convention.
2021-02-18 08:23:24 +08:00
#ifndef JEMALLOC_INTERNAL_PH_H
#define JEMALLOC_INTERNAL_PH_H
Pairing heap Initial implementation of a twopass pairing heap with aux list. Research papers linked in comments. Where search/nsearch/last aren't needed, this gives much faster first(), delete(), and insert(). Insert is O(1), and first/delete don't have to walk the whole tree. Also tested rb_old with parent pointers - it was better than the current rb.h for memory loads, but still much worse than a pairing heap. An array-based heap would be much faster if everything fits in memory, but on a cold cache it has many more memory loads for most operations.
2016-03-01 03:22:52 +08:00
/*
* A Pairing Heap implementation.
*
* "The Pairing Heap: A New Form of Self-Adjusting Heap"
* https://www.cs.cmu.edu/~sleator/papers/pairing-heaps.pdf
*
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
* With auxiliary twopass list, described in a follow on paper.
Pairing heap Initial implementation of a twopass pairing heap with aux list. Research papers linked in comments. Where search/nsearch/last aren't needed, this gives much faster first(), delete(), and insert(). Insert is O(1), and first/delete don't have to walk the whole tree. Also tested rb_old with parent pointers - it was better than the current rb.h for memory loads, but still much worse than a pairing heap. An array-based heap would be much faster if everything fits in memory, but on a cold cache it has many more memory loads for most operations.
2016-03-01 03:22:52 +08:00
*
* "Pairing Heaps: Experiments and Analysis"
* http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.106.2988&rep=rep1&type=pdf
*
*******************************************************************************
*/
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
typedef int (*ph_cmp_t)(void *, void *);
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
/* Node structure. */
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
typedef struct phn_link_s phn_link_t;
struct phn_link_s {
void *prev;
void *next;
void *lchild;
};
typedef struct ph_s ph_t;
struct ph_s {
void *root;
};
JEMALLOC_ALWAYS_INLINE phn_link_t *
phn_link_get(void *phn, size_t offset) {
return (phn_link_t *)(((uintptr_t)phn) + offset);
Refactor ph_merge_ordered() out of ph_merge().
2016-03-09 05:43:47 +08:00
}
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
JEMALLOC_ALWAYS_INLINE void
phn_link_init(void *phn, size_t offset) {
phn_link_get(phn, offset)->prev = NULL;
phn_link_get(phn, offset)->next = NULL;
phn_link_get(phn, offset)->lchild = NULL;
Pairing heap Initial implementation of a twopass pairing heap with aux list. Research papers linked in comments. Where search/nsearch/last aren't needed, this gives much faster first(), delete(), and insert(). Insert is O(1), and first/delete don't have to walk the whole tree. Also tested rb_old with parent pointers - it was better than the current rb.h for memory loads, but still much worse than a pairing heap. An array-based heap would be much faster if everything fits in memory, but on a cold cache it has many more memory loads for most operations.
2016-03-01 03:22:52 +08:00
}
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
/* Internal utility helpers. */
JEMALLOC_ALWAYS_INLINE void *
phn_lchild_get(void *phn, size_t offset) {
return phn_link_get(phn, offset)->lchild;
}
JEMALLOC_ALWAYS_INLINE void
phn_lchild_set(void *phn, void *lchild, size_t offset) {
phn_link_get(phn, offset)->lchild = lchild;
}
JEMALLOC_ALWAYS_INLINE void *
phn_next_get(void *phn, size_t offset) {
return phn_link_get(phn, offset)->next;
}
JEMALLOC_ALWAYS_INLINE void
phn_next_set(void *phn, void *next, size_t offset) {
phn_link_get(phn, offset)->next = next;
}
JEMALLOC_ALWAYS_INLINE void *
phn_prev_get(void *phn, size_t offset) {
return phn_link_get(phn, offset)->prev;
}
JEMALLOC_ALWAYS_INLINE void
phn_prev_set(void *phn, void *prev, size_t offset) {
phn_link_get(phn, offset)->prev = prev;
}
JEMALLOC_ALWAYS_INLINE void
phn_merge_ordered(void *phn0, void *phn1, size_t offset,
ph_cmp_t cmp) {
void *phn0child;
assert(phn0 != NULL);
assert(phn1 != NULL);
assert(cmp(phn0, phn1) <= 0);
phn_prev_set(phn1, phn0, offset);
phn0child = phn_lchild_get(phn0, offset);
phn_next_set(phn1, phn0child, offset);
if (phn0child != NULL) {
phn_prev_set(phn0child, phn1, offset);
}
phn_lchild_set(phn0, phn1, offset);
}
JEMALLOC_ALWAYS_INLINE void *
phn_merge(void *phn0, void *phn1, size_t offset, ph_cmp_t cmp) {
void *result;
if (phn0 == NULL) {
result = phn1;
} else if (phn1 == NULL) {
result = phn0;
} else if (cmp(phn0, phn1) < 0) {
phn_merge_ordered(phn0, phn1, offset, cmp);
result = phn0;
} else {
phn_merge_ordered(phn1, phn0, offset, cmp);
result = phn1;
}
return result;
}
JEMALLOC_ALWAYS_INLINE void *
phn_merge_siblings(void *phn, size_t offset, ph_cmp_t cmp) {
void *head = NULL;
void *tail = NULL;
void *phn0 = phn;
void *phn1 = phn_next_get(phn0, offset);
/*
* Multipass merge, wherein the first two elements of a FIFO
* are repeatedly merged, and each result is appended to the
* singly linked FIFO, until the FIFO contains only a single
* element. We start with a sibling list but no reference to
* its tail, so we do a single pass over the sibling list to
* populate the FIFO.
*/
if (phn1 != NULL) {
void *phnrest = phn_next_get(phn1, offset);
if (phnrest != NULL) {
phn_prev_set(phnrest, NULL, offset);
}
phn_prev_set(phn0, NULL, offset);
phn_next_set(phn0, NULL, offset);
phn_prev_set(phn1, NULL, offset);
phn_next_set(phn1, NULL, offset);
phn0 = phn_merge(phn0, phn1, offset, cmp);
head = tail = phn0;
phn0 = phnrest;
while (phn0 != NULL) {
phn1 = phn_next_get(phn0, offset);
if (phn1 != NULL) {
phnrest = phn_next_get(phn1, offset);
if (phnrest != NULL) {
phn_prev_set(phnrest, NULL, offset);
}
phn_prev_set(phn0, NULL, offset);
phn_next_set(phn0, NULL, offset);
phn_prev_set(phn1, NULL, offset);
phn_next_set(phn1, NULL, offset);
phn0 = phn_merge(phn0, phn1, offset, cmp);
phn_next_set(tail, phn0, offset);
tail = phn0;
phn0 = phnrest;
} else {
phn_next_set(tail, phn0, offset);
tail = phn0;
phn0 = NULL;
}
}
phn0 = head;
phn1 = phn_next_get(phn0, offset);
if (phn1 != NULL) {
while (true) {
head = phn_next_get(phn1, offset);
assert(phn_prev_get(phn0, offset) == NULL);
phn_next_set(phn0, NULL, offset);
assert(phn_prev_get(phn1, offset) == NULL);
phn_next_set(phn1, NULL, offset);
phn0 = phn_merge(phn0, phn1, offset, cmp);
if (head == NULL) {
break;
}
phn_next_set(tail, phn0, offset);
tail = phn0;
phn0 = head;
phn1 = phn_next_get(phn0, offset);
}
}
}
return phn0;
}
JEMALLOC_ALWAYS_INLINE void
ph_merge_aux(ph_t *ph, size_t offset, ph_cmp_t cmp) {
void *phn = phn_next_get(ph->root, offset);
if (phn != NULL) {
phn_prev_set(ph->root, NULL, offset);
phn_next_set(ph->root, NULL, offset);
phn_prev_set(phn, NULL, offset);
phn = phn_merge_siblings(phn, offset, cmp);
assert(phn_next_get(phn, offset) == NULL);
ph->root = phn_merge(ph->root, phn, offset, cmp);
}
}
JEMALLOC_ALWAYS_INLINE void *
ph_merge_children(void *phn, size_t offset, ph_cmp_t cmp) {
void *result;
void *lchild = phn_lchild_get(phn, offset);
if (lchild == NULL) {
result = NULL;
} else {
result = phn_merge_siblings(lchild, offset, cmp);
}
return result;
}
JEMALLOC_ALWAYS_INLINE void
ph_new(ph_t *ph) {
ph->root = NULL;
}
JEMALLOC_ALWAYS_INLINE bool
ph_empty(ph_t *ph) {
return ph->root == NULL;
}
JEMALLOC_ALWAYS_INLINE void *
ph_first(ph_t *ph, size_t offset, ph_cmp_t cmp) {
if (ph->root == NULL) {
return NULL;
}
ph_merge_aux(ph, offset, cmp);
return ph->root;
}
JEMALLOC_ALWAYS_INLINE void *
ph_any(ph_t *ph, size_t offset) {
if (ph->root == NULL) {
return NULL;
}
void *aux = phn_next_get(ph->root, offset);
if (aux != NULL) {
return aux;
}
return ph->root;
}
JEMALLOC_ALWAYS_INLINE void
ph_insert(ph_t *ph, void *phn, size_t offset) {
phn_link_init(phn, offset);
/*
* Treat the root as an aux list during insertion, and lazily merge
* during a_prefix##remove_first(). For elements that are inserted,
* then removed via a_prefix##remove() before the aux list is ever
* processed, this makes insert/remove constant-time, whereas eager
* merging would make insert O(log n).
*/
if (ph->root == NULL) {
ph->root = phn;
} else {
phn_next_set(phn, phn_next_get(ph->root, offset), offset);
if (phn_next_get(ph->root, offset) != NULL) {
phn_prev_set(phn_next_get(ph->root, offset), phn,
offset);
}
phn_prev_set(phn, ph->root, offset);
phn_next_set(ph->root, phn, offset);
}
}
JEMALLOC_ALWAYS_INLINE void *
ph_remove_first(ph_t *ph, size_t offset, ph_cmp_t cmp) {
void *ret;
if (ph->root == NULL) {
return NULL;
}
ph_merge_aux(ph, offset, cmp);
ret = ph->root;
ph->root = ph_merge_children(ph->root, offset, cmp);
return ret;
}
JEMALLOC_ALWAYS_INLINE void *
ph_remove_any(ph_t *ph, size_t offset, ph_cmp_t cmp) {
/*
* Remove the most recently inserted aux list element, or the root if
* the aux list is empty. This has the effect of behaving as a LIFO
* (and insertion/removal is therefore constant-time) if
* a_prefix##[remove_]first() are never called.
*/
if (ph->root == NULL) {
return NULL;
}
void *ret = phn_next_get(ph->root, offset);
if (ret != NULL) {
void *aux = phn_next_get(ret, offset);
phn_next_set(ph->root, aux, offset);
if (aux != NULL) {
phn_prev_set(aux, ph->root, offset);
}
return ret;
}
ret = ph->root;
ph->root = ph_merge_children(ph->root, offset, cmp);
return ret;
}
JEMALLOC_ALWAYS_INLINE void
ph_remove(ph_t *ph, void *phn, size_t offset, ph_cmp_t cmp) {
void *replace;
void *parent;
if (ph->root == phn) {
/*
* We can delete from aux list without merging it, but we need
* to merge if we are dealing with the root node and it has
* children.
*/
if (phn_lchild_get(phn, offset) == NULL) {
ph->root = phn_next_get(phn, offset);
if (ph->root != NULL) {
phn_prev_set(ph->root, NULL, offset);
}
return;
}
ph_merge_aux(ph, offset, cmp);
if (ph->root == phn) {
ph->root = ph_merge_children(ph->root, offset, cmp);
return;
}
}
/* Get parent (if phn is leftmost child) before mutating. */
if ((parent = phn_prev_get(phn, offset)) != NULL) {
if (phn_lchild_get(parent, offset) != phn) {
parent = NULL;
}
}
/* Find a possible replacement node, and link to parent. */
replace = ph_merge_children(phn, offset, cmp);
/* Set next/prev for sibling linked list. */
if (replace != NULL) {
if (parent != NULL) {
phn_prev_set(replace, parent, offset);
phn_lchild_set(parent, replace, offset);
} else {
phn_prev_set(replace, phn_prev_get(phn, offset),
offset);
if (phn_prev_get(phn, offset) != NULL) {
phn_next_set(phn_prev_get(phn, offset), replace,
offset);
}
}
phn_next_set(replace, phn_next_get(phn, offset), offset);
if (phn_next_get(phn, offset) != NULL) {
phn_prev_set(phn_next_get(phn, offset), replace,
offset);
}
} else {
if (parent != NULL) {
void *next = phn_next_get(phn, offset);
phn_lchild_set(parent, next, offset);
if (next != NULL) {
phn_prev_set(next, parent, offset);
}
} else {
assert(phn_prev_get(phn, offset) != NULL);
phn_next_set(
phn_prev_get(phn, offset),
phn_next_get(phn, offset), offset);
}
if (phn_next_get(phn, offset) != NULL) {
phn_prev_set(
phn_next_get(phn, offset),
phn_prev_get(phn, offset), offset);
}
}
}
#define ph_structs(a_prefix, a_type) \
typedef struct { \
phn_link_t link; \
} a_prefix##_link_t; \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
\
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
typedef struct { \
ph_t ph; \
} a_prefix##_t;
Pairing heap Initial implementation of a twopass pairing heap with aux list. Research papers linked in comments. Where search/nsearch/last aren't needed, this gives much faster first(), delete(), and insert(). Insert is O(1), and first/delete don't have to walk the whole tree. Also tested rb_old with parent pointers - it was better than the current rb.h for memory loads, but still much worse than a pairing heap. An array-based heap would be much faster if everything fits in memory, but on a cold cache it has many more memory loads for most operations.
2016-03-01 03:22:52 +08:00
/*
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
* The ph_proto() macro generates function prototypes that correspond to the
* functions generated by an equivalently parameterized call to ph_gen().
Pairing heap Initial implementation of a twopass pairing heap with aux list. Research papers linked in comments. Where search/nsearch/last aren't needed, this gives much faster first(), delete(), and insert(). Insert is O(1), and first/delete don't have to walk the whole tree. Also tested rb_old with parent pointers - it was better than the current rb.h for memory loads, but still much worse than a pairing heap. An array-based heap would be much faster if everything fits in memory, but on a cold cache it has many more memory loads for most operations.
2016-03-01 03:22:52 +08:00
*/
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
#define ph_proto(a_attr, a_prefix, a_type) \
\
a_attr void a_prefix##_new(a_prefix##_t *ph); \
a_attr bool a_prefix##_empty(a_prefix##_t *ph); \
a_attr a_type *a_prefix##_first(a_prefix##_t *ph); \
a_attr a_type *a_prefix##_any(a_prefix##_t *ph); \
a_attr void a_prefix##_insert(a_prefix##_t *ph, a_type *phn); \
a_attr a_type *a_prefix##_remove_first(a_prefix##_t *ph); \
a_attr a_type *a_prefix##_remove_any(a_prefix##_t *ph); \
a_attr void a_prefix##_remove(a_prefix##_t *ph, a_type *phn);
Pairing heap Initial implementation of a twopass pairing heap with aux list. Research papers linked in comments. Where search/nsearch/last aren't needed, this gives much faster first(), delete(), and insert(). Insert is O(1), and first/delete don't have to walk the whole tree. Also tested rb_old with parent pointers - it was better than the current rb.h for memory loads, but still much worse than a pairing heap. An array-based heap would be much faster if everything fits in memory, but on a cold cache it has many more memory loads for most operations.
2016-03-01 03:22:52 +08:00
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
/* The ph_gen() macro generates a type-specific pairing heap implementation. */
#define ph_gen(a_attr, a_prefix, a_type, a_field, a_cmp) \
JEMALLOC_ALWAYS_INLINE int \
a_prefix##_ph_cmp(void *a, void *b) { \
return a_cmp((a_type *)a, (a_type *)b); \
} \
\
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
a_attr void \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_prefix##_new(a_prefix##_t *ph) { \
ph_new(&ph->ph); \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
} \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
\
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
a_attr bool \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_prefix##_empty(a_prefix##_t *ph) { \
return ph_empty(&ph->ph); \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
} \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
\
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
a_attr a_type * \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_prefix##_first(a_prefix##_t *ph) { \
return ph_first(&ph->ph, offsetof(a_type, a_field), \
&a_prefix##_ph_cmp); \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
} \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
\
Add any() and remove_any() to ph. These functions select the easiest-to-remove element in the heap, which is either the most recently inserted aux list element or the root. If no calls are made to first() or remove_first(), the behavior (and time complexity) is the same as for a LIFO queue.
2017-03-04 14:51:21 +08:00
a_attr a_type * \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_prefix##_any(a_prefix##_t *ph) { \
return ph_any(&ph->ph, offsetof(a_type, a_field)); \
Add any() and remove_any() to ph. These functions select the easiest-to-remove element in the heap, which is either the most recently inserted aux list element or the root. If no calls are made to first() or remove_first(), the behavior (and time complexity) is the same as for a LIFO queue.
2017-03-04 14:51:21 +08:00
} \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
\
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_attr void \
a_prefix##_insert(a_prefix##_t *ph, a_type *phn) { \
ph_insert(&ph->ph, phn, offsetof(a_type, a_field)); \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
} \
\
Add any() and remove_any() to ph. These functions select the easiest-to-remove element in the heap, which is either the most recently inserted aux list element or the root. If no calls are made to first() or remove_first(), the behavior (and time complexity) is the same as for a LIFO queue.
2017-03-04 14:51:21 +08:00
a_attr a_type * \
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_prefix##_remove_first(a_prefix##_t *ph) { \
return ph_remove_first(&ph->ph, offsetof(a_type, a_field), \
a_prefix##_ph_cmp); \
Add any() and remove_any() to ph. These functions select the easiest-to-remove element in the heap, which is either the most recently inserted aux list element or the root. If no calls are made to first() or remove_first(), the behavior (and time complexity) is the same as for a LIFO queue.
2017-03-04 14:51:21 +08:00
} \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
\
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_attr a_type * \
a_prefix##_remove_any(a_prefix##_t *ph) { \
return ph_remove_any(&ph->ph, offsetof(a_type, a_field), \
a_prefix##_ph_cmp); \
} \
Refactor/fix ph. Refactor ph to support configurable comparison functions. Use a cpp macro code generation form equivalent to the rb macros so that pairing heaps can be used for both run heaps and chunk heaps. Remove per node parent pointers, and instead use leftmost siblings' prev pointers to track parents. Fix multi-pass sibling merging to iterate over intermediate results using a FIFO, rather than a LIFO. Use this fixed sibling merging implementation for both merge phases of the auxiliary twopass algorithm (first merging the aux list, then replacing the root with its merged children). This fixes both degenerate merge behavior and the potential for deep recursion. This regression was introduced by 6bafa6678fc36483e638f1c3a0a9bf79fb89bfc9 (Pairing heap). This resolves #371.
2016-03-27 08:30:37 +08:00
\
Pairing heap: inline functions instead of macros. By force-inlining everything that would otherwise be a macro, we get the same effect (it's not clear in the first place that this is actually a good idea, but it avoids making any changes to the existing performance profile). This makes the code more maintainable (in anticipation of subsequent changes), as well as making performance profiles and debug info more readable (we get "real" line numbers, instead of making everything point to the macro definition of all associated functions).
2021-07-20 07:47:10 +08:00
a_attr void \
a_prefix##_remove(a_prefix##_t *ph, a_type *phn) { \
ph_remove(&ph->ph, phn, offsetof(a_type, a_field), \
a_prefix##_ph_cmp); \
Pairing heap Initial implementation of a twopass pairing heap with aux list. Research papers linked in comments. Where search/nsearch/last aren't needed, this gives much faster first(), delete(), and insert(). Insert is O(1), and first/delete don't have to walk the whole tree. Also tested rb_old with parent pointers - it was better than the current rb.h for memory loads, but still much worse than a pairing heap. An array-based heap would be much faster if everything fits in memory, but on a cold cache it has many more memory loads for most operations.
2016-03-01 03:22:52 +08:00
}
Clean up some minor data structure inconsistencies Namely, unify the include guard styling with the majority of the project, and do flat_bitmap -> fb, to match its naming convention.
2021-02-18 08:23:24 +08:00
#endif /* JEMALLOC_INTERNAL_PH_H */
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