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1f43a3430e
When a script is executed, a flag is used to allow it to yield. An error is returned if a lua function yield, explicitly or not. But there is no way to get this capability in C functions. So there is no way to choose to yield or not depending on this capability. To fill this gap, the flag HLUA_NOYIELD is introduced and added on the lua context if the current script execution is not authorized to yield. Macros to set, clear and test this flags are also added. This feature will be usefull to fix some bugs in lua actions execution.
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/*
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* include/haproxy/hlua.h
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* Lua core management functions
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*
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* Copyright (C) 2015-2016 Thierry Fournier <tfournier@arpalert.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_HLUA_H
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#define _HAPROXY_HLUA_H
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#include <haproxy/hlua-t.h>
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#ifdef USE_LUA
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/* The following macros are used to set flags. */
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#define HLUA_SET_RUN(__hlua) do {(__hlua)->flags |= HLUA_RUN;} while(0)
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#define HLUA_CLR_RUN(__hlua) do {(__hlua)->flags &= ~HLUA_RUN;} while(0)
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#define HLUA_IS_RUNNING(__hlua) ((__hlua)->flags & HLUA_RUN)
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#define HLUA_SET_CTRLYIELD(__hlua) do {(__hlua)->flags |= HLUA_CTRLYIELD;} while(0)
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#define HLUA_CLR_CTRLYIELD(__hlua) do {(__hlua)->flags &= ~HLUA_CTRLYIELD;} while(0)
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#define HLUA_IS_CTRLYIELDING(__hlua) ((__hlua)->flags & HLUA_CTRLYIELD)
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#define HLUA_SET_WAKERESWR(__hlua) do {(__hlua)->flags |= HLUA_WAKERESWR;} while(0)
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#define HLUA_CLR_WAKERESWR(__hlua) do {(__hlua)->flags &= ~HLUA_WAKERESWR;} while(0)
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#define HLUA_IS_WAKERESWR(__hlua) ((__hlua)->flags & HLUA_WAKERESWR)
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#define HLUA_SET_WAKEREQWR(__hlua) do {(__hlua)->flags |= HLUA_WAKEREQWR;} while(0)
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#define HLUA_CLR_WAKEREQWR(__hlua) do {(__hlua)->flags &= ~HLUA_WAKEREQWR;} while(0)
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#define HLUA_IS_WAKEREQWR(__hlua) ((__hlua)->flags & HLUA_WAKEREQWR)
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#define HLUA_CLR_NOYIELD(__hlua) do {(__hlua)->flags &= ~HLUA_NOYIELD;} while(0)
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#define HLUA_SET_NOYIELD(__hlua) do {(__hlua)->flags |= HLUA_NOYIELD;} while(0)
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#define HLUA_CANT_YIELD(__hlua) ((__hlua)->flags & HLUA_NOYIELD)
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#define HLUA_INIT(__hlua) do { (__hlua)->T = 0; } while(0)
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/* Lua HAProxy integration functions. */
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const char *hlua_traceback(lua_State *L, const char* sep);
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void hlua_ctx_destroy(struct hlua *lua);
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void hlua_init();
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int hlua_post_init();
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void hlua_applet_tcp_fct(struct appctx *ctx);
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void hlua_applet_http_fct(struct appctx *ctx);
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struct task *hlua_process_task(struct task *task, void *context, unsigned int state);
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#else /* USE_LUA */
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/************************ For use when Lua is disabled ********************/
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#define HLUA_IS_RUNNING(__hlua) 0
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#define HLUA_INIT(__hlua)
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/* Empty function for compilation without Lua. */
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static inline void hlua_init() { }
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static inline int hlua_post_init() { return 1; }
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static inline void hlua_ctx_destroy(struct hlua *lua) { }
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#endif /* USE_LUA */
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#endif /* _HAPROXY_HLUA_H */
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