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-rw-r--r--app/nginx/src/core/ngx_module.c360
1 files changed, 360 insertions, 0 deletions
diff --git a/app/nginx/src/core/ngx_module.c b/app/nginx/src/core/ngx_module.c
new file mode 100644
index 0000000..3e3c506
--- /dev/null
+++ b/app/nginx/src/core/ngx_module.c
@@ -0,0 +1,360 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Maxim Dounin
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#define NGX_MAX_DYNAMIC_MODULES 128
+
+
+static ngx_uint_t ngx_module_index(ngx_cycle_t *cycle);
+static ngx_uint_t ngx_module_ctx_index(ngx_cycle_t *cycle, ngx_uint_t type,
+ ngx_uint_t index);
+
+
+ngx_uint_t ngx_max_module;
+static ngx_uint_t ngx_modules_n;
+
+
+ngx_int_t
+ngx_preinit_modules(void)
+{
+ ngx_uint_t i;
+
+ for (i = 0; ngx_modules[i]; i++) {
+ ngx_modules[i]->index = i;
+ ngx_modules[i]->name = ngx_module_names[i];
+ }
+
+ ngx_modules_n = i;
+ ngx_max_module = ngx_modules_n + NGX_MAX_DYNAMIC_MODULES;
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
+ngx_cycle_modules(ngx_cycle_t *cycle)
+{
+ /*
+ * create a list of modules to be used for this cycle,
+ * copy static modules to it
+ */
+
+ cycle->modules = ngx_pcalloc(cycle->pool, (ngx_max_module + 1)
+ * sizeof(ngx_module_t *));
+ if (cycle->modules == NULL) {
+ return NGX_ERROR;
+ }
+
+ ngx_memcpy(cycle->modules, ngx_modules,
+ ngx_modules_n * sizeof(ngx_module_t *));
+
+ cycle->modules_n = ngx_modules_n;
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
+ngx_init_modules(ngx_cycle_t *cycle)
+{
+ ngx_uint_t i;
+
+ for (i = 0; cycle->modules[i]; i++) {
+ if (cycle->modules[i]->init_module) {
+ if (cycle->modules[i]->init_module(cycle) != NGX_OK) {
+ return NGX_ERROR;
+ }
+ }
+ }
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
+ngx_count_modules(ngx_cycle_t *cycle, ngx_uint_t type)
+{
+ ngx_uint_t i, next, max;
+ ngx_module_t *module;
+
+ next = 0;
+ max = 0;
+
+ /* count appropriate modules, set up their indices */
+
+ for (i = 0; cycle->modules[i]; i++) {
+ module = cycle->modules[i];
+
+ if (module->type != type) {
+ continue;
+ }
+
+ if (module->ctx_index != NGX_MODULE_UNSET_INDEX) {
+
+ /* if ctx_index was assigned, preserve it */
+
+ if (module->ctx_index > max) {
+ max = module->ctx_index;
+ }
+
+ if (module->ctx_index == next) {
+ next++;
+ }
+
+ continue;
+ }
+
+ /* search for some free index */
+
+ module->ctx_index = ngx_module_ctx_index(cycle, type, next);
+
+ if (module->ctx_index > max) {
+ max = module->ctx_index;
+ }
+
+ next = module->ctx_index + 1;
+ }
+
+ /*
+ * make sure the number returned is big enough for previous
+ * cycle as well, else there will be problems if the number
+ * will be stored in a global variable (as it's used to be)
+ * and we'll have to roll back to the previous cycle
+ */
+
+ if (cycle->old_cycle && cycle->old_cycle->modules) {
+
+ for (i = 0; cycle->old_cycle->modules[i]; i++) {
+ module = cycle->old_cycle->modules[i];
+
+ if (module->type != type) {
+ continue;
+ }
+
+ if (module->ctx_index > max) {
+ max = module->ctx_index;
+ }
+ }
+ }
+
+ /* prevent loading of additional modules */
+
+ cycle->modules_used = 1;
+
+ return max + 1;
+}
+
+
+ngx_int_t
+ngx_add_module(ngx_conf_t *cf, ngx_str_t *file, ngx_module_t *module,
+ char **order)
+{
+ void *rv;
+ ngx_uint_t i, m, before;
+ ngx_core_module_t *core_module;
+
+ if (cf->cycle->modules_n >= ngx_max_module) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "too many modules loaded");
+ return NGX_ERROR;
+ }
+
+ if (module->version != nginx_version) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "module \"%V\" version %ui instead of %ui",
+ file, module->version, (ngx_uint_t) nginx_version);
+ return NGX_ERROR;
+ }
+
+ if (ngx_strcmp(module->signature, NGX_MODULE_SIGNATURE) != 0) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "module \"%V\" is not binary compatible",
+ file);
+ return NGX_ERROR;
+ }
+
+ for (m = 0; cf->cycle->modules[m]; m++) {
+ if (ngx_strcmp(cf->cycle->modules[m]->name, module->name) == 0) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "module \"%s\" is already loaded",
+ module->name);
+ return NGX_ERROR;
+ }
+ }
+
+ /*
+ * if the module wasn't previously loaded, assign an index
+ */
+
+ if (module->index == NGX_MODULE_UNSET_INDEX) {
+ module->index = ngx_module_index(cf->cycle);
+
+ if (module->index >= ngx_max_module) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "too many modules loaded");
+ return NGX_ERROR;
+ }
+ }
+
+ /*
+ * put the module into the cycle->modules array
+ */
+
+ before = cf->cycle->modules_n;
+
+ if (order) {
+ for (i = 0; order[i]; i++) {
+ if (ngx_strcmp(order[i], module->name) == 0) {
+ i++;
+ break;
+ }
+ }
+
+ for ( /* void */ ; order[i]; i++) {
+
+#if 0
+ ngx_log_debug2(NGX_LOG_DEBUG_CORE, cf->log, 0,
+ "module: %s before %s",
+ module->name, order[i]);
+#endif
+
+ for (m = 0; m < before; m++) {
+ if (ngx_strcmp(cf->cycle->modules[m]->name, order[i]) == 0) {
+
+ ngx_log_debug3(NGX_LOG_DEBUG_CORE, cf->log, 0,
+ "module: %s before %s:%i",
+ module->name, order[i], m);
+
+ before = m;
+ break;
+ }
+ }
+ }
+ }
+
+ /* put the module before modules[before] */
+
+ if (before != cf->cycle->modules_n) {
+ ngx_memmove(&cf->cycle->modules[before + 1],
+ &cf->cycle->modules[before],
+ (cf->cycle->modules_n - before) * sizeof(ngx_module_t *));
+ }
+
+ cf->cycle->modules[before] = module;
+ cf->cycle->modules_n++;
+
+ if (module->type == NGX_CORE_MODULE) {
+
+ /*
+ * we are smart enough to initialize core modules;
+ * other modules are expected to be loaded before
+ * initialization - e.g., http modules must be loaded
+ * before http{} block
+ */
+
+ core_module = module->ctx;
+
+ if (core_module->create_conf) {
+ rv = core_module->create_conf(cf->cycle);
+ if (rv == NULL) {
+ return NGX_ERROR;
+ }
+
+ cf->cycle->conf_ctx[module->index] = rv;
+ }
+ }
+
+ return NGX_OK;
+}
+
+
+static ngx_uint_t
+ngx_module_index(ngx_cycle_t *cycle)
+{
+ ngx_uint_t i, index;
+ ngx_module_t *module;
+
+ index = 0;
+
+again:
+
+ /* find an unused index */
+
+ for (i = 0; cycle->modules[i]; i++) {
+ module = cycle->modules[i];
+
+ if (module->index == index) {
+ index++;
+ goto again;
+ }
+ }
+
+ /* check previous cycle */
+
+ if (cycle->old_cycle && cycle->old_cycle->modules) {
+
+ for (i = 0; cycle->old_cycle->modules[i]; i++) {
+ module = cycle->old_cycle->modules[i];
+
+ if (module->index == index) {
+ index++;
+ goto again;
+ }
+ }
+ }
+
+ return index;
+}
+
+
+static ngx_uint_t
+ngx_module_ctx_index(ngx_cycle_t *cycle, ngx_uint_t type, ngx_uint_t index)
+{
+ ngx_uint_t i;
+ ngx_module_t *module;
+
+again:
+
+ /* find an unused ctx_index */
+
+ for (i = 0; cycle->modules[i]; i++) {
+ module = cycle->modules[i];
+
+ if (module->type != type) {
+ continue;
+ }
+
+ if (module->ctx_index == index) {
+ index++;
+ goto again;
+ }
+ }
+
+ /* check previous cycle */
+
+ if (cycle->old_cycle && cycle->old_cycle->modules) {
+
+ for (i = 0; cycle->old_cycle->modules[i]; i++) {
+ module = cycle->old_cycle->modules[i];
+
+ if (module->type != type) {
+ continue;
+ }
+
+ if (module->ctx_index == index) {
+ index++;
+ goto again;
+ }
+ }
+ }
+
+ return index;
+}