mirror of
https://github.com/fish-shell/fish-shell
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e76c1fd139
No longer using RAII wrappers around pthread_mutex_t and pthread_cond_t in favor of the C++11 std::mutex, std::recursive_mutex, and std::condition_variable data types.
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
// Library for pooling common strings.
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#include "config.h" // IWYU pragma: keep
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#include <stddef.h>
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#include <wchar.h>
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#include <algorithm>
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#include <memory>
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#include <vector>
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#include "common.h"
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#include "fallback.h" // IWYU pragma: keep
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#include "intern.h"
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bool string_less_than_string(const wchar_t *a, const wchar_t *b) { return wcscmp(a, b) < 0; }
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/// The table of intern'd strings.
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owning_lock<std::vector<const wchar_t *>> string_table;
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static const wchar_t *intern_with_dup(const wchar_t *in, bool dup) {
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if (!in) return NULL;
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debug(5, L"intern %ls", in);
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auto &&lock_string_table = string_table.acquire();
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std::vector<const wchar_t *> &string_table = lock_string_table.value;
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const wchar_t *result;
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auto iter =
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std::lower_bound(string_table.begin(), string_table.end(), in, string_less_than_string);
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if (iter != string_table.end() && wcscmp(*iter, in) == 0) {
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result = *iter;
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} else {
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result = dup ? wcsdup(in) : in;
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string_table.insert(iter, result);
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}
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return result;
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}
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const wchar_t *intern(const wchar_t *in) { return intern_with_dup(in, true); }
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const wchar_t *intern_static(const wchar_t *in) { return intern_with_dup(in, false); }
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