summaryrefslogtreecommitdiff
path: root/ngx_stream_lua-0.0.16/src/ngx_stream_lua_api.c
blob: cf01b365af2e8a099c5297a96de552ad79385b82 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
/*
 * !!! DO NOT EDIT DIRECTLY !!!
 * This file was automatically generated from the following template:
 *
 * src/subsys/ngx_subsys_lua_api.c.tt2
 */


/*
 * Copyright (C) Yichun Zhang (agentzh)
 */


#ifndef DDEBUG
#define DDEBUG 0
#endif
#include "ddebug.h"


#include "ngx_stream_lua_common.h"
#include "api/ngx_stream_lua_api.h"
#include "ngx_stream_lua_shdict.h"
#include "ngx_stream_lua_util.h"


lua_State *
ngx_stream_lua_get_global_state(ngx_conf_t *cf)
{
    ngx_stream_lua_main_conf_t       *lmcf;

    lmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_lua_module);

    return lmcf->lua;
}




static ngx_int_t ngx_stream_lua_shared_memory_init(ngx_shm_zone_t *shm_zone,
    void *data);


ngx_int_t
ngx_stream_lua_add_package_preload(ngx_conf_t *cf, const char *package,
    lua_CFunction func)
{
    lua_State       *L;

    ngx_stream_lua_main_conf_t            *lmcf;
    ngx_stream_lua_preload_hook_t         *hook;

    lmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_lua_module);

    L = lmcf->lua;

    if (L) {
        lua_getglobal(L, "package");
        lua_getfield(L, -1, "preload");
        lua_pushcfunction(L, func);
        lua_setfield(L, -2, package);
        lua_pop(L, 2);
    }

    /* we always register preload_hooks since we always create new Lua VMs
     * when lua code cache is off. */

    if (lmcf->preload_hooks == NULL) {
        lmcf->preload_hooks =
            ngx_array_create(cf->pool, 4,
                             sizeof(ngx_stream_lua_preload_hook_t));

        if (lmcf->preload_hooks == NULL) {
            return NGX_ERROR;
        }
    }

    hook = ngx_array_push(lmcf->preload_hooks);
    if (hook == NULL) {
        return NGX_ERROR;
    }

    hook->package = (u_char *) package;
    hook->loader = func;

    return NGX_OK;
}


ngx_shm_zone_t *
ngx_stream_lua_shared_memory_add(ngx_conf_t *cf, ngx_str_t *name,
    size_t size, void *tag)
{
    ngx_stream_lua_main_conf_t           *lmcf;
    ngx_stream_lua_shm_zone_ctx_t        *ctx;

    ngx_shm_zone_t              **zp;
    ngx_shm_zone_t               *zone;
    ngx_int_t                     n;

    lmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_lua_module);
    if (lmcf == NULL) {
        return NULL;
    }

    if (lmcf->shm_zones == NULL) {
        lmcf->shm_zones = ngx_palloc(cf->pool, sizeof(ngx_array_t));
        if (lmcf->shm_zones == NULL) {
            return NULL;
        }

        if (ngx_array_init(lmcf->shm_zones, cf->pool, 2,
                           sizeof(ngx_shm_zone_t *))
            != NGX_OK)
        {
            return NULL;
        }
    }

    zone = ngx_shared_memory_add(cf, name, (size_t) size, tag);
    if (zone == NULL) {
        return NULL;
    }

    if (zone->data) {
        ctx = (ngx_stream_lua_shm_zone_ctx_t *) zone->data;
        return &ctx->zone;
    }

    n = sizeof(ngx_stream_lua_shm_zone_ctx_t);

    ctx = ngx_pcalloc(cf->pool, n);
    if (ctx == NULL) {
        return NULL;
    }

    ctx->lmcf = lmcf;
    ctx->log = &cf->cycle->new_log;
    ctx->cycle = cf->cycle;

    ngx_memcpy(&ctx->zone, zone, sizeof(ngx_shm_zone_t));

    zp = ngx_array_push(lmcf->shm_zones);
    if (zp == NULL) {
        return NULL;
    }

    *zp = zone;

    /* set zone init */
    zone->init = ngx_stream_lua_shared_memory_init;
    zone->data = ctx;

    lmcf->requires_shm = 1;

    return &ctx->zone;
}


static ngx_int_t
ngx_stream_lua_shared_memory_init(ngx_shm_zone_t *shm_zone, void *data)
{
    ngx_stream_lua_shm_zone_ctx_t       *octx = data;
    ngx_stream_lua_main_conf_t          *lmcf;
    ngx_stream_lua_shm_zone_ctx_t       *ctx;

    ngx_shm_zone_t              *ozone;
    void                        *odata;
    ngx_int_t                    rc;
    volatile ngx_cycle_t        *saved_cycle;
    ngx_shm_zone_t              *zone;

    ctx = (ngx_stream_lua_shm_zone_ctx_t *) shm_zone->data;
    zone = &ctx->zone;

    odata = NULL;
    if (octx) {
        ozone = &octx->zone;
        odata = ozone->data;
    }

    zone->shm = shm_zone->shm;
#if defined(nginx_version) && nginx_version >= 1009000
    zone->noreuse = shm_zone->noreuse;
#endif

    if (zone->init(zone, odata) != NGX_OK) {
        return NGX_ERROR;
    }

    dd("get lmcf");

    lmcf = ctx->lmcf;
    if (lmcf == NULL) {
        return NGX_ERROR;
    }

    dd("lmcf->lua: %p", lmcf->lua);

    lmcf->shm_zones_inited++;

    if (lmcf->shm_zones_inited == lmcf->shm_zones->nelts
        && lmcf->init_handler && !ngx_test_config)
    {
        saved_cycle = ngx_cycle;
        ngx_cycle = ctx->cycle;

        rc = lmcf->init_handler(ctx->log, lmcf, lmcf->lua);

        ngx_cycle = saved_cycle;

        if (rc != NGX_OK) {
            /* an error happened */
            return NGX_ERROR;
        }
    }

    return NGX_OK;
}

/* vi:set ft=c ts=4 sw=4 et fdm=marker: */