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asarium
8fcb05bfd0
This allows a script to create its own execution context so that it can control when a coroutine is valid to play based on custom data. Also adds a function which causes a coroutine to end in an error.
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
#include "LuaExecutionContext.h"
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#include "scripting/ade_args.h"
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#include "scripting/api/objs/enums.h"
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namespace scripting {
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namespace api {
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LuaExecutionContext::LuaExecutionContext(luacpp::LuaFunction contextFunction)
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: m_contextFunction(std::move(contextFunction))
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{
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}
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LuaExecutionContext::~LuaExecutionContext() = default;
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executor::IExecutionContext::State LuaExecutionContext::determineContextState() const
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{
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auto L = m_contextFunction.getLuaState();
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const auto returnVal = m_contextFunction.call(L);
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if (returnVal.size() != 1) {
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LuaError(L, "Need exactly one return value for Lua execution context function!");
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return executor::IExecutionContext::State::Invalid;
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}
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const auto currentTop = lua_gettop(L);
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returnVal[0].pushValue(L);
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enum_h enumValue;
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internal::Ade_get_args_lfunction = true;
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internal::Ade_get_args_skip = currentTop;
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if (!ade_get_args(L, "o", l_Enum.Get(&enumValue))) {
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lua_settop(L, currentTop);
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return executor::IExecutionContext::State::Invalid;
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}
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lua_settop(L, currentTop);
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switch (enumValue.index) {
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case LE_CONTEXT_INVALID:
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return executor::IExecutionContext::State::Invalid;
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case LE_CONTEXT_SUSPENDED:
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return executor::IExecutionContext::State::Suspended;
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case LE_CONTEXT_VALID:
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return executor::IExecutionContext::State::Valid;
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default:
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LuaError(L, "Got invalid enum value %s from Lua context function.", enumValue.getName().c_str());
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return executor::IExecutionContext::State::Invalid;
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}
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}
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} // namespace api
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} // namespace scripting
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