1 /*
2 * Copyright (C) the libgit2 contributors. All rights reserved.
3 *
4 * This file is part of libgit2, distributed under the GNU GPL v2 with
5 * a Linking Exception. For full terms see the included COPYING file.
6 */
7
8 #include "common.h"
9
10 #if !defined(GIT_THREADS)
11
12 #define TLSDATA_MAX 16
13
14 typedef struct {
15 void *value;
16 void (GIT_SYSTEM_CALL *destroy_fn)(void *);
17 } tlsdata_value;
18
19 static tlsdata_value tlsdata_values[TLSDATA_MAX];
20 static int tlsdata_cnt = 0;
21
git_tlsdata_init(git_tlsdata_key * key,void (GIT_SYSTEM_CALL * destroy_fn)(void *))22 int git_tlsdata_init(git_tlsdata_key *key, void (GIT_SYSTEM_CALL *destroy_fn)(void *))
23 {
24 if (tlsdata_cnt >= TLSDATA_MAX)
25 return -1;
26
27 tlsdata_values[tlsdata_cnt].value = NULL;
28 tlsdata_values[tlsdata_cnt].destroy_fn = destroy_fn;
29
30 *key = tlsdata_cnt;
31 tlsdata_cnt++;
32
33 return 0;
34 }
35
git_tlsdata_set(git_tlsdata_key key,void * value)36 int git_tlsdata_set(git_tlsdata_key key, void *value)
37 {
38 if (key < 0 || key > tlsdata_cnt)
39 return -1;
40
41 tlsdata_values[key].value = value;
42 return 0;
43 }
44
git_tlsdata_get(git_tlsdata_key key)45 void *git_tlsdata_get(git_tlsdata_key key)
46 {
47 if (key < 0 || key > tlsdata_cnt)
48 return NULL;
49
50 return tlsdata_values[key].value;
51 }
52
git_tlsdata_dispose(git_tlsdata_key key)53 int git_tlsdata_dispose(git_tlsdata_key key)
54 {
55 void *value;
56 void (*destroy_fn)(void *) = NULL;
57
58 if (key < 0 || key > tlsdata_cnt)
59 return -1;
60
61 value = tlsdata_values[key].value;
62 destroy_fn = tlsdata_values[key].destroy_fn;
63
64 tlsdata_values[key].value = NULL;
65 tlsdata_values[key].destroy_fn = NULL;
66
67 if (value && destroy_fn)
68 destroy_fn(value);
69
70 return 0;
71 }
72
73 #elif defined(GIT_WIN32)
74
git_tlsdata_init(git_tlsdata_key * key,void (GIT_SYSTEM_CALL * destroy_fn)(void *))75 int git_tlsdata_init(git_tlsdata_key *key, void (GIT_SYSTEM_CALL *destroy_fn)(void *))
76 {
77 DWORD fls_index = FlsAlloc(destroy_fn);
78
79 if (fls_index == FLS_OUT_OF_INDEXES)
80 return -1;
81
82 *key = fls_index;
83 return 0;
84 }
85
git_tlsdata_set(git_tlsdata_key key,void * value)86 int git_tlsdata_set(git_tlsdata_key key, void *value)
87 {
88 if (!FlsSetValue(key, value))
89 return -1;
90
91 return 0;
92 }
93
git_tlsdata_get(git_tlsdata_key key)94 void *git_tlsdata_get(git_tlsdata_key key)
95 {
96 return FlsGetValue(key);
97 }
98
git_tlsdata_dispose(git_tlsdata_key key)99 int git_tlsdata_dispose(git_tlsdata_key key)
100 {
101 if (!FlsFree(key))
102 return -1;
103
104 return 0;
105 }
106
107 #elif defined(_POSIX_THREADS)
108
git_tlsdata_init(git_tlsdata_key * key,void (GIT_SYSTEM_CALL * destroy_fn)(void *))109 int git_tlsdata_init(git_tlsdata_key *key, void (GIT_SYSTEM_CALL *destroy_fn)(void *))
110 {
111 if (pthread_key_create(key, destroy_fn) != 0)
112 return -1;
113
114 return 0;
115 }
116
git_tlsdata_set(git_tlsdata_key key,void * value)117 int git_tlsdata_set(git_tlsdata_key key, void *value)
118 {
119 if (pthread_setspecific(key, value) != 0)
120 return -1;
121
122 return 0;
123 }
124
git_tlsdata_get(git_tlsdata_key key)125 void *git_tlsdata_get(git_tlsdata_key key)
126 {
127 return pthread_getspecific(key);
128 }
129
git_tlsdata_dispose(git_tlsdata_key key)130 int git_tlsdata_dispose(git_tlsdata_key key)
131 {
132 if (pthread_key_delete(key) != 0)
133 return -1;
134
135 return 0;
136 }
137
138 #else
139 # error unknown threading model
140 #endif
141