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131 changes: 131 additions & 0 deletions
131
src/common/proxy_wasm/ngx_proxy_wasm_foreign_callback.c
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| #ifndef DDEBUG | ||
| #define DDEBUG 0 | ||
| #endif | ||
| #include "ddebug.h" | ||
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| #include <ngx_proxy_wasm_foreign_callback.h> | ||
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| void | ||
| ngx_proxy_wasm_foreign_callback_destroy(ngx_proxy_wasm_foreign_cb_t *cb) | ||
| { | ||
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| ngx_pfree(cb->pwexec->pool, cb); | ||
| } | ||
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| ngx_proxy_wasm_foreign_cb_t * | ||
| ngx_proxy_wasm_foreign_callback_alloc(ngx_proxy_wasm_exec_t *pwexec) | ||
| { | ||
| ngx_proxy_wasm_foreign_cb_t *cb; | ||
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| cb = ngx_palloc(pwexec->pool, sizeof(ngx_proxy_wasm_foreign_cb_t)); | ||
| cb->pwexec = pwexec; | ||
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| return cb; | ||
| } | ||
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| void | ||
| ngx_proxy_wasm_foreign_callback(ngx_proxy_wasm_foreign_cb_t *cb) | ||
| { | ||
| ngx_proxy_wasm_exec_t *pwexec = cb->pwexec; | ||
| ngx_proxy_wasm_err_e ecode = NGX_PROXY_WASM_ERR_NONE; | ||
| ngx_proxy_wasm_step_e step = pwexec->parent->step; | ||
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| ngx_queue_remove(&cb->q); | ||
| pwexec->fcallback = cb; | ||
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| #if (NGX_WASM_HTTP) | ||
| pwexec->parent->phase = ngx_wasm_phase_lookup(&ngx_http_wasm_subsystem, | ||
| NGX_WASM_BACKGROUND_PHASE); | ||
| #endif | ||
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| ecode = ngx_proxy_wasm_run_step(pwexec, | ||
| NGX_PROXY_WASM_STEP_FOREIGN_CALLBACK); | ||
| if (ecode != NGX_PROXY_WASM_ERR_NONE) { | ||
| /* TODO: error handling */ | ||
| } | ||
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| pwexec->parent->step = step; | ||
| pwexec->fcallback = NULL; | ||
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| if (ngx_proxy_wasm_foreign_callbacks_total(pwexec)) { | ||
| ngx_log_debug0(NGX_LOG_DEBUG_WASM, pwexec->log, 0, | ||
| "proxy_wasm more foreign function callbacks pending..."); | ||
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| #if (NGX_WASM_HTTP) | ||
| ngx_wasm_yield(&cb->rctx->env); | ||
| #endif | ||
| ngx_proxy_wasm_ctx_set_next_action(pwexec->parent, | ||
| NGX_PROXY_WASM_ACTION_PAUSE); | ||
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| } else { | ||
| ngx_log_debug0(NGX_LOG_DEBUG_WASM, pwexec->log, 0, | ||
| "proxy_wasm last foreign function callback handled"); | ||
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| #if (NGX_WASM_HTTP) | ||
| ngx_wasm_continue(&cb->rctx->env); | ||
| #endif | ||
| ngx_proxy_wasm_ctx_set_next_action(pwexec->parent, | ||
| NGX_PROXY_WASM_ACTION_CONTINUE); | ||
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| /* resume current step if unfinished */ | ||
| ngx_proxy_wasm_resume(pwexec->parent, pwexec->parent->phase, step); | ||
| } | ||
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| ngx_proxy_wasm_foreign_callback_destroy(cb); | ||
| } | ||
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| ngx_int_t | ||
| ngx_proxy_wasm_foreign_callback_buffer_create(ngx_proxy_wasm_foreign_cb_t *cb, | ||
| size_t size) | ||
| { | ||
| ngx_buf_t *b; | ||
| ngx_chain_t *cl; | ||
| ngx_proxy_wasm_exec_t *pwexec = cb->pwexec; | ||
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| ngx_wa_assert(pwexec); | ||
| ngx_wa_assert(size); | ||
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| cl = ngx_alloc_chain_link(pwexec->pool); | ||
| if (cl == NULL) { | ||
| return NGX_ERROR; | ||
| } | ||
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| /* TODO: if size exceeds a threshold, split allocation into N buffers */ | ||
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| b = ngx_create_temp_buf(pwexec->pool, size); | ||
| if (b == NULL) { | ||
| return NGX_ERROR; | ||
| } | ||
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| cl->buf = b; | ||
| cl->next = NULL; | ||
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| cb->args_out = cl; | ||
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| return NGX_OK; | ||
| } | ||
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| ngx_int_t | ||
| ngx_proxy_wasm_foreign_callback_buffer_write(ngx_proxy_wasm_foreign_cb_t *cb, | ||
| ngx_str_t *data) | ||
| { | ||
| size_t b_size; | ||
| ngx_buf_t *b = cb->args_out->buf; | ||
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| b_size = b->end - b->start; | ||
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| ngx_wa_assert(data->len <= b_size); | ||
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| if (data->len <= b_size) { | ||
| b->last = ngx_cpymem(b->last, data->data, data->len); | ||
| } | ||
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| /* TODO: data->len > b_size */ | ||
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| return NGX_OK; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| #ifndef _NGX_PROXY_WASM_FOREIGN_CALLBACK_H_INCLUDED_ | ||
| #define _NGX_PROXY_WASM_FOREIGN_CALLBACK_H_INCLUDED_ | ||
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| #include <ngx_wasm_subsystem.h> | ||
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| struct ngx_proxy_wasm_foreign_cb_s { | ||
| ngx_queue_t q; | ||
| ngx_proxy_wasm_exec_t *pwexec; | ||
| #if (NGX_WASM_HTTP) | ||
| ngx_http_wasm_req_ctx_t *rctx; | ||
| #endif | ||
| ngx_proxy_wasm_foreign_function_e fcode; | ||
| ngx_chain_t *args_out; | ||
| }; | ||
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| ngx_proxy_wasm_foreign_cb_t * ngx_proxy_wasm_foreign_callback_alloc( | ||
| ngx_proxy_wasm_exec_t *pwexec); | ||
| void ngx_proxy_wasm_foreign_callback(ngx_proxy_wasm_foreign_cb_t *cb); | ||
| ngx_int_t ngx_proxy_wasm_foreign_callback_buffer_create( | ||
| ngx_proxy_wasm_foreign_cb_t *cb, size_t size); | ||
| ngx_int_t ngx_proxy_wasm_foreign_callback_buffer_write( | ||
| ngx_proxy_wasm_foreign_cb_t *cb, ngx_str_t *data); | ||
| void ngx_proxy_wasm_foreign_callback_destroy(ngx_proxy_wasm_foreign_cb_t *cb); | ||
| #endif |
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