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This system permits to send signals between lua tasks. A main lua stack can register the signal in a coprocess. When the coprocess finish his job, it send a signal, and the associated task is wakes. If the main lua execution stack stop (with or without errors), the list or pending signals is purged.
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
#ifndef _TYPES_HLUA_H
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#define _TYPES_HLUA_H
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#include <lua.h>
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enum hlua_state {
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HLUA_STOP = 0,
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HLUA_RUN,
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};
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enum hlua_exec {
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HLUA_E_OK = 0,
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HLUA_E_AGAIN, /* LUA yield, must resume the stack execution later, when
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the associatedtask is waked. */
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HLUA_E_ERRMSG, /* LUA stack execution failed with a string error message
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in the top of stack. */
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HLUA_E_ERR, /* LUA stack execution failed without error message. */
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};
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struct hlua {
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lua_State *T; /* The LUA stack. */
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int Tref; /* The reference of the stack in coroutine case.
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-1 for the main lua stack. */
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int Mref; /* The reference of the memory context in coroutine case.
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-1 if the memory context is not used. */
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int nargs; /* The number of arguments in the stack at the start of execution. */
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enum hlua_state state; /* The current execution state. */
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struct task *task; /* The task associated with the lua stack execution.
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We must wake this task to continue the task execution */
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struct list com; /* The list head of the signals attached to this task. */
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struct ebpt_node node;
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};
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struct hlua_com {
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struct list purge_me; /* Part of the list of signals to be purged in the
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case of the LUA execution stack crash. */
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struct list wake_me; /* Part of list of signals to be targeted if an
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event occurs. */
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struct task *task; /* The task to be wake if an event occurs. */
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};
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#endif /* _TYPES_HLUA_H */
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