Show packing and unpacking data, Computer Engineering

Assignment Help:

Q. Show Packing and Unpacking Data?

Packing and Unpacking Data 

  • pvm_packs - Pack active message buffer with arrays of prescribed data type:
  • int info = pvm_packf( const char *fmt, ... )
  • int info = pvm_pkbyte( char *xp, int nitem, int stride )
  • int info = pvm_pkcplx( float *cp, int nitem, int stride )
  • int info = pvm_pkdcplx( double *zp, int nitem, int stride )
  • int info = pvm_pkdouble( double *dp, int nitem, int stride )
  • int info = pvm_pkfloat( float *fp, int nitem, int stride )
  • int info = pvm_pkint( int *ip, int nitem, int stride )
  • int info = pvm_pkuint( unsigned int *ip, int nitem, int stride )
  • int info = pvm_pkushort( unsigned short *ip, int nitem, int stride )
  • int info = pvm_pkulong( unsigned long *ip, int nitem, int stride )
  • int info = pvm_pklong( long *ip, int nitem, int stride )
  • int info = pvm_pkshort( short *jp, int nitem, int stride )
  • int info = pvm_pkstr( char *sp )

fmt Printf-like format expression denoting what to pack. nitem is total number of items to be packed (not number of bytes). stride is stride to be used when packing the items. 

  • pvm_unpack - Unpacks the active message buffer into arrays of prescribed data type. It has been implemented for different data types:
  • int info = pvm_unpackf( const char *fmt, ... )
  • int info = pvm_upkbyte( char *xp, int nitem, int stride)
  • int info = pvm_upkcplx( float *cp, int nitem, int stride)
  • int info = pvm_upkdcplx( double *zp, int nitem, int stride)
  • int info = pvm_upkdouble( double *dp, int nitem, int stride)
  • int info = pvm_upkfloat( float *fp, int nitem, int stride)
  • int info = pvm_upkint( int *ip, int nitem, int stride)
  • int info = pvm_upkuint( unsigned int *ip, int nitem, int stride )
  • int info = pvm_upkushort( unsigned short *ip, int nitem, int stride )
  • int info = pvm_upkulong( unsigned long *ip, int nitem, int stride )
  • int info = pvm_upklong( long *ip, int nitem, int stride)
  • int info = pvm_upkshort( short *jp, int nitem, int stride)
  • int info = pvm_upkstr( char *sp )

Every of the pvm_upk* routines unpacks an array of given data type from active receive buffer. The arguments for every of routines are a pointer to the array to be unpacked into, nitem that is the total number of items to unpack and stride that is the stride to use when unpacking. An exception is pvm_upkstr() that by definition unpacks a NULL terminated character string and So doesn't require nitem or stride arguments.


Related Discussions:- Show packing and unpacking data

Instruction issue degree, Instruction Issue degree : The major concept in s...

Instruction Issue degree : The major concept in superscalar processing is how many instructions we can issue per cycle. If we issue k number of instructions per cycle in a supersca

Logic-based expert systems - artificial intelligence, Logic-based Expert Sy...

Logic-based Expert Systems - Artificial intelligence: Expert systems are agents which are programmed to make decisions about real world situations. They are put together by uti

What do you mean by electronic funds transfer, What do you mean by Electron...

What do you mean by Electronic Funds Transfer? Electronic Funds Transfer: It’s an electronic payment method which transfers the money value through one bank account to o

By which the information is stored in ROM, The information in ROM is stored...

The information in ROM is stored ? Ans. By the manufacturer throughout fabrication of the device.

When can we see layer groups in gimp, Sometimes it is nice to place layers ...

Sometimes it is nice to place layers in groups. It makes them simple to organize when you have lots of them. It also means you can simply apply the similar effect to lots of layers

Meaning of every field in mips instruction, Q. Meaning of every field in MI...

Q. Meaning of every field in MIPS instruction? The meaning of every field in MIPS instruction is given below: op: operation code or opcode rs: First register source

Performance and issues in pipelining-throughput, Performance and Issues in ...

Performance and Issues in Pipelining Throughput:  Throughput of a pipeline can be defined as the number of results that have been getting per unit time. It can be denoted as:

Interpeter, diifference between pure and impure interpeter

diifference between pure and impure interpeter

Difference among java beans & servlets, Java bean is a reusable component, ...

Java bean is a reusable component, where as the servlet is the java program which extends the server capability.

Describe about relationships and look up fields, Relationships are imported...

Relationships are imported from the source to finish without any hindrance but once they land in the destination they can never be changed or changed and change of extensions canno

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd