158 lines
5.0 KiB
C
158 lines
5.0 KiB
C
/**
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* @file NCDInterpreter.h
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef BADVPN_NCD_INTERPRETER_H
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#define BADVPN_NCD_INTERPRETER_H
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#include <stddef.h>
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#include <misc/debug.h>
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#include <base/DebugObject.h>
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#include <system/BTime.h>
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#include <system/BReactor.h>
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#include <ncd/NCDStringIndex.h>
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#include <ncd/NCDModuleIndex.h>
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#include <ncd/NCDAst.h>
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#include <ncd/NCDEvaluator.h>
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#include <ncd/NCDInterpProg.h>
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#include <ncd/NCDModule.h>
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#include <structure/LinkedList1.h>
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#ifndef BADVPN_NO_PROCESS
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#include <system/BProcess.h>
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#endif
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#ifndef BADVPN_NO_UDEV
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#include <udevmonitor/NCDUdevManager.h>
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#endif
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#ifndef BADVPN_NO_RANDOM
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#include <random/BRandom2.h>
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#endif
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/**
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* Handler called when the interpreter has terminated, and {@link NCDInterpreter_Free}
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* can be called.
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*
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* @param user the user member of struct {@link NCDInterpreter_params}
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* @param exit_code the exit code specified in the last interpreter termination request
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*/
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typedef void (*NCDInterpreter_handler_finished) (void *user, int exit_code);
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struct NCDInterpreter_params {
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// callbacks
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NCDInterpreter_handler_finished handler_finished;
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void *user;
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// options
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btime_t retry_time;
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char **extra_args;
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int num_extra_args;
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// possibly shared resources
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BReactor *reactor;
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#ifndef BADVPN_NO_PROCESS
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BProcessManager *manager;
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#endif
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#ifndef BADVPN_NO_UDEV
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NCDUdevManager *umanager;
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#endif
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#ifndef BADVPN_NO_RANDOM
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BRandom2 *random2;
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#endif
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};
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typedef struct {
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// parameters
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struct NCDInterpreter_params params;
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// are we terminating
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int terminating;
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int main_exit_code;
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// string index
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NCDStringIndex string_index;
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// module index
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NCDModuleIndex mindex;
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// program AST
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NCDProgram program;
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// expression evaluator
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NCDEvaluator evaluator;
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// structure for efficient interpretation
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NCDInterpProg iprogram;
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// common module parameters
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struct NCDModuleInst_params module_params;
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struct NCDModuleInst_iparams module_iparams;
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struct NCDCall_interp_shared module_call_shared;
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// processes
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LinkedList1 processes;
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DebugObject d_obj;
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} NCDInterpreter;
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/**
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* Initializes and starts the interpreter.
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*
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* @param o the interpreter
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* @param program the program to execute in AST format. The program must
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* not contain any 'include' or 'include_guard' directives.
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* The interpreter takes ownership of the program, regardless
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* of the success of this function.
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* @param params other parameters
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* @return 1 on success, 0 on failure
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*/
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int NCDInterpreter_Init (NCDInterpreter *o, NCDProgram program, struct NCDInterpreter_params params) WARN_UNUSED;
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/**
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* Frees the interpreter.
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* This may only be called after the interpreter has terminated, i.e.
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* the {@link NCDInterpreter_handler_finished} handler has been called.
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* Additionally, it can be called right after {@link NCDInterpreter_Init}
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* before any of the interpreter's {@link BPendingGroup} jobs have executed.
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*/
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void NCDInterpreter_Free (NCDInterpreter *o);
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/**
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* Requests termination of the interpreter.
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* NOTE: the program can request its own termination, possibly overriding the exit
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* code specified here. Expect the program to terminate even if this function was
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* not called.
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*
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* @param o the interpreter
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* @param exit_code the exit code to be passed to {@link NCDInterpreter_handler_finished}.
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* This overrides any exit code set previously.
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*/
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void NCDInterpreter_RequestShutdown (NCDInterpreter *o, int exit_code);
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#endif
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