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Specialize std::hash for ptid_t

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This changes hash_ptid to instead be a specialization of std::hash.
This makes it a little easier to use with standard containers.

Approved-By: Simon Marchi <simon.marchi@efficios.com>
This commit is contained in:
Tom Tromey
2023-09-11 08:45:37 -06:00
parent 14432bde07
commit 9a343d2bb5
3 changed files with 4 additions and 5 deletions
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2
gdb/inferior.h
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@ -462,7 +462,7 @@ public:
/* A map of ptid_t to thread_info*, for average O(1) ptid_t lookup. /* A map of ptid_t to thread_info*, for average O(1) ptid_t lookup.
Exited threads do not appear in the map. */ Exited threads do not appear in the map. */
std::unordered_map<ptid_t, thread_info *, hash_ptid> ptid_thread_map; std::unordered_map<ptid_t, thread_info *> ptid_thread_map;
/* Returns a range adapter covering the inferior's threads, /* Returns a range adapter covering the inferior's threads,
including exited threads. Used like this: including exited threads. Used like this:

2
gdb/regcache.c
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@ -329,7 +329,7 @@ reg_buffer::assert_regnum (int regnum) const
regcaches, associated to different gdbarches). */ regcaches, associated to different gdbarches). */
using ptid_regcache_map using ptid_regcache_map
= std::unordered_multimap<ptid_t, regcache_up, hash_ptid>; = std::unordered_multimap<ptid_t, regcache_up>;
/* Type holding regcaches for a given pid. */ /* Type holding regcaches for a given pid. */

5
gdbsupport/ptid.h
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@ -157,9 +157,8 @@ private:
tid_type m_tid; tid_type m_tid;
}; };
/* Functor to hash a ptid. */ template<>
struct std::hash<ptid_t>
struct hash_ptid
{ {
size_t operator() (const ptid_t &ptid) const size_t operator() (const ptid_t &ptid) const
{ {