US 5,511,167 AGranted

Program processing method and apparatus for producing a data flow type program

AssigneeHitachi, Ltd.

InventorsKatsumi Kawano, Kinji Mori, Yasuo Suzuki, Masayuki Orimo, Hirokazu Kasashima, Kozo Nakai

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Abstract

A program processing method in a distributed processing system including a shared transmission medium and a plurality of processors connected thereto in which a sequence of processing is executed by the processors in a distributed manner and programs for executing the sequence of processing are respectively stored in the processors. Each processor executed, when information necessary for an execution of a program stored therein is arranged, the program with the arranged information set as input information and then transmits information resultant from the execution to the shared transmission medium. When storing a new program described conforming to a predetermined program, the processor detects program codes respectively of input and output instruction parts of the program to rearranged the parts such that the program codes respectively of the input and output instruction parts are located at positions in the program respectively before and after other processing part. When information necessary for an execution of the program is prepared, the processor executes the input and output instruction parts respectively before and after the other processing.

Claims12

Dependent claims

A program processing method in a distributed processing system including a transmission medium and a plurality of processors connected thereto in which a sequence of processing is executed in a distributed manner and in which programs executing the sequence of processing are distributed to and stored in said plurality of processors, each of said processors transmits messages to said transmission medium to communicate with other processors, each of the messages including an information field and a content code field which identifies the contents of a corresponding information field, said method comprising the steps of:

reading a program in which program codes are described;
detecting an input processing section and an output processing section in said read program;
setting input auxiliary variables corresponding to input variables used in said input processing section of said read program and output auxiliary variables corresponding to output variables used in said output processing section of said read program;
rewriting said input processing section of said read program such that values of said input auxiliary variables are substituted for said input variables and said output processing section of said read program such that values of said output auxiliary variables are substituted for said output variables;
producing auxiliary input and output processing sections for said input and output auxiliary variables based on said input and output processing sections, respectively, and arranging said auxiliary input processing section before other processing sections of said read program and said auxiliary output processing section after the other processing sections of said read program thereof to produce a new program;
and
storing said new program in one of said processors so that said one of said processors accepts messages transmitted through said transmission medium when the content field code in the message indicates a predetermined content code, and that said new program starts executing when data of said input variables is entirely accepted into said one of said processors.

4 more elements

A program processing apparatus in a distributed processing system including a transmission medium and a plurality of processors connected thereto in which a sequence of processing is executed in a distributed manner and in which programs executing the sequence of processing are distributed to and stored in said plurality of processors, each of said processors transmits messages to said transmission medium to communicate with other processors, each of the messages including an information field and a content code field which identifies the contents of a corresponding information field, said program processing apparatus comprising:

means for reading a program in which program codes are described;
means for detecting an input processing section and an output processing section in said read program;
means for setting input auxiliary variables corresponding to input variables used in said input processing section of said read program and output auxiliary variables corresponding to output variables used in said output processing section of said read program;
means for rewriting said input processing section of said read program such that values of said input auxiliary variables are substituted for said input variables and said output processing section of said read program such that values of said output variables are substituted for said output auxiliary variables;
means for producing auxiliary input and output processing sections for said input and output auxiliary variables based on said input and output processing sections, respectively, and arranging said auxiliary processing section before other processing sections of said read program and said auxiliary output processing section after the other processing section of said read program thereof to produce a new program;
and
means for storing said new program in one of said processors so that said one of said processors accepts messages transmitted through said transmission medium when the content field code in the message indicates a predetermined content code, and that said new program starts executing when data of said input variables is entirely accepted into said one of said processors.

4 more elements

Dependencies are inferred from the claim text.