thodg/libgit2/src/util/thread.c
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Hash : c3b7ace9
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Date : 2021-11-14T16:43:53
refactor: make util an object library Instead of simply including the utility files directly, make them a cmake object library for easy reusability between other projects within libgit2. Now the top-level `src` is responsible for platform selection, while the next-level `libgit2` and `util` configurations are responsible for identifying what objects they include.
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src/util/thread.c
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/* * Copyright (C) the libgit2 contributors. All rights reserved. * * This file is part of libgit2, distributed under the GNU GPL v2 with * a Linking Exception. For full terms see the included COPYING file. */ #include "git2_util.h" #if !defined(GIT_THREADS) #define TLSDATA_MAX 16 typedef struct { void *value; void (GIT_SYSTEM_CALL *destroy_fn)(void *); } tlsdata_value; static tlsdata_value tlsdata_values[TLSDATA_MAX]; static int tlsdata_cnt = 0; int git_tlsdata_init(git_tlsdata_key *key, void (GIT_SYSTEM_CALL *destroy_fn)(void *)) { if (tlsdata_cnt >= TLSDATA_MAX) return -1; tlsdata_values[tlsdata_cnt].value = NULL; tlsdata_values[tlsdata_cnt].destroy_fn = destroy_fn; *key = tlsdata_cnt; tlsdata_cnt++; return 0; } int git_tlsdata_set(git_tlsdata_key key, void *value) { if (key < 0 || key > tlsdata_cnt) return -1; tlsdata_values[key].value = value; return 0; } void *git_tlsdata_get(git_tlsdata_key key) { if (key < 0 || key > tlsdata_cnt) return NULL; return tlsdata_values[key].value; } int git_tlsdata_dispose(git_tlsdata_key key) { void *value; void (*destroy_fn)(void *) = NULL; if (key < 0 || key > tlsdata_cnt) return -1; value = tlsdata_values[key].value; destroy_fn = tlsdata_values[key].destroy_fn; tlsdata_values[key].value = NULL; tlsdata_values[key].destroy_fn = NULL; if (value && destroy_fn) destroy_fn(value); return 0; } #elif defined(GIT_WIN32) int git_tlsdata_init(git_tlsdata_key *key, void (GIT_SYSTEM_CALL *destroy_fn)(void *)) { DWORD fls_index = FlsAlloc(destroy_fn); if (fls_index == FLS_OUT_OF_INDEXES) return -1; *key = fls_index; return 0; } int git_tlsdata_set(git_tlsdata_key key, void *value) { if (!FlsSetValue(key, value)) return -1; return 0; } void *git_tlsdata_get(git_tlsdata_key key) { return FlsGetValue(key); } int git_tlsdata_dispose(git_tlsdata_key key) { if (!FlsFree(key)) return -1; return 0; } #elif defined(_POSIX_THREADS) int git_tlsdata_init(git_tlsdata_key *key, void (GIT_SYSTEM_CALL *destroy_fn)(void *)) { if (pthread_key_create(key, destroy_fn) != 0) return -1; return 0; } int git_tlsdata_set(git_tlsdata_key key, void *value) { if (pthread_setspecific(key, value) != 0) return -1; return 0; } void *git_tlsdata_get(git_tlsdata_key key) { return pthread_getspecific(key); } int git_tlsdata_dispose(git_tlsdata_key key) { if (pthread_key_delete(key) != 0) return -1; return 0; } #else # error unknown threading model #endif