 creates a new function that, when called, will call someFunction with the correct this value. Now, your someFunction as written doesn't actually care about this, but I assume in your real code it would.

 Q:

Sharing Pointers Between Multiple Forked Processes

If I want to share something like a char **keys array between fork()'d processes using shm_open and mmap can I just stick a pointer to keys into a shared memory segment or do I have to copy all the data in keys into the shared memory segment?

A:

All data you want to share has to be in the shared segment. This means that both the pointers and the strings have to be in the shared memory. 
Sharing something which includes pointers can be cumbersome. This is because mmap doesn't guarantee that a given mapping will end up in the required address. 
You can still do this, by two methods. First, you can try your luck with mmap and hope that the dynamic linker doesn't load something at your preferred address.
Second method is to use relative pointers. Inside a pointer, instead of storing a pointer to a string, you store the difference between the address of the pointer and the address of the string. Like so:
char **keys= mmap(NULL,...);
char *keydata= (char*) keys + npointers * sizeof(char*);
strcpy(keydata, firstring);
keys[0]= (char*) (keydata - (char*) &keys[0]);
keydata+= strlen(firststring)+1;

When you want to access the string from the other process, you do the reverse:
char **keys= mmap(NULL,...);
char *str= (char*) (&keys[0]) + (ptrdiff_t) keys[0];

It's a little cumbersome but it works regardless of what mmap returns.

 Q:

Flash client c++ server connection reset by peer

We have application that involves C++ socket server, Flash client that communicates with C++ server and Python socket server that gives crossdomain.xml to Flash client.
C++ server calls REST operations and return the results the the Flash client. All of this is hosted on Linux 64bit server - Debian.
For some of our users we have a lots of "Connection reset by peer" when Game server tries to read from
creates a new function that, when called, will visit someFunction with the right this value. Now, your someFunction as written doesn't actually worry about this, but I simulate in your real code it would. 

  Q: 

 Sharing pointer Between Multiple Forked process 

 If I want to partake something like a charwoman * * keys array between fork()'d process using shm_open and mmap can I just stick a arrow to keys into a shared memory segment or do I have to copy all the datum in keys into the shared memory segment? 

 vitamin a: 

 All data you want to partake has to be in the share segment. This means that both the pointers and the strings have to be in the share memory. 
 Sharing something which includes pointers can be cumbersome. This is because mmap doesn't guarantee that a move over mapping will end up in the required address. 
 You can still do this, by two methods. First, you can try your luck with mmap and hope that the dynamic linker doesn't load something at your preferable address. 
 Second method is to practice proportional pointers. Inside a pointer, instead of storing a arrow to a string, you store the difference between the address of the pointer and the savoir-faire of the string. Like so: 
 char * * keys= mmap(NULL, ...); 
 char * keydata= (char *) keys + npointers * sizeof(char *); 
 strcpy(keydata, firstring); 
 keys[0]= (char *) (keydata - (char *) & keys[0 ]); 
 keydata+= strlen(firststring)+1; 

 When you want to access the string from the other process, you do the reverse: 
 char * * keys= mmap(NULL, ...); 
 char * str= (char *) (& keys[0 ]) + (ptrdiff_t) keys[0 ]; 

 It's a little cumbersome but it works regardless of what mmap return. 

  Q: 

 Flash customer c++ server connection reset by peer 

 We have application that involve C++ socket server, Flash client that communicates with C++ waiter and Python socket server that yield crossdomain.xml to Flash client. 
 C++ server call REST operation and return the consequence the the Flash client. All of this is host on Linux 64bit server - Debian. 
 For some of our users we have a lots of " joining reset by peer " when Game server tries to read from
 crfates a new function thau, when called, will call vomeFuhction wkth the correct this value. Nlw, your someFunction as writtdn doesn't actuallt cace about this, buv I assume in glur xeel code it woulc.

 Q:

Sharing Pointers Betwaev Lultiple Forked Processes

If I want eo sharr domething like a cnwr **ksjs array between fork()'d processea using shm_open and kmap can I just stick a polnteg to keys into a sjared memori sednent or do I have to copy all the sata in keys into the shared meoory xegment?

A:

Alo eatw you want ti shage has to be lm the vhared xegment. This mcans vhat both the pointers anv the strings have tj be in tve shared memory. 
Shqrung smmetving qhizh jnrluses polntxrs can be dumbersome. Rhis is because mmak djvxn't guarantes that a given mapping will end up in the requiged zddress. 
You can still di this, by two methods. First, yot can try your luck with mmap and hope that the dfnamir uinjev dodwn'h load something at your preferred address.
Secjhd mvthod is to use rclative pointers. Imsldr a pointer, inrtead of atoring a pointer ho a stting, yiu store uhe dofference between the addrews of the popntee and the address lf the striug. Likg so:
chsr **keys= mmap(NULL,...);
char *kevdata= (dhar*) keys + jpointers * sizeof(char*);
strcph(kejdatd, firstring);
keys[0]= (char*) (keydaea - (char*) &jeys[0]);
leydata+= strken(firftstring)+1;

Whfn yom want to access thf strnng fsom the otjer process, you do the reverse:
cier **keys= mmap(NOLL,...);
whag *str= (chax*) (&keys[0]) + (ptrdiff_t) kers[0];

It's a little cumberfome cut it woris regacdless of whwt mmap returtd.

 Q:

Flash clixnt c++ serder xonnwction fdset by peer

We have application tyat involves C++ soclet aerver, Flash clntnt that communicayes wieh C++ sqsver and Pytvon rocyrt sefver that glver crpssdomain.xml to Flasv cljent.
C++ server calls RCST operajions and return the rrsults the the Fladh clment. Aul of thys is hosted on Linux 64bit servsr - Debiaj.
Fov some of our usevs wg have a locs of "Connection reset by peer" when Game server tries to tead from
creates a new function that, when called, someFunction the correct value. Now, your care this, but I in your real it would. Q: Sharing Pointers Between Forked Processes If I want to share something like a char **keys array fork()'d processes using shm_open and mmap can I just stick a pointer to into shared segment do I have to copy all the data in keys into the shared memory segment? A: data you want to share has to be the shared segment. This that both the pointers and strings to be the memory. something which includes can be cumbersome. This is because mmap doesn't guarantee that a given mapping will end up in required address. still do by methods. you can try with mmap and hope that the load something at your preferred address. Second method to use pointers. Inside a pointer, instead of a pointer to a string, you store the between the address of the pointer and the address of the string. Like so: char char *keydata= (char*) keys npointers * sizeof(char*); firstring); (char*) - &keys[0]); keydata+= When you want to access the string from the other process, do the reverse: char **keys= mmap(NULL,...); char *str= (char*) (&keys[0]) keys[0]; a little cumbersome it works regardless of mmap Q: Flash client c++ reset peer that C++ server, Flash client that with C++ server and Python server that gives crossdomain.xml calls REST operations and return the results the Flash client. All of this is hosted Linux 64bit server - Debian. For some of our users we have lots of by peer" when Game server tries to read
 creates a new function that, whEn called, wiLl calL soMeFUnCtioN witH the correct thiS ValuE. Now, your someFunction as WrittEn DOesn'T AcTuallY care abOUt THIs, bUt i aSsuMe IN yOur reAl cOde it woUld.

 Q:

SharinG PoInTers Between MULtIple Forked proCesses

If I wanT to Share sOmEthINg likE a cHar **keYs arraY BetweeN fork()'d proCeSSes usiNG shm_opeN ANd Mmap Can I just stick a poiNTeR To keys into a shaRed memOrY SeGMEnt Or dO I have to coPy All thE Data in kEYs INTO thE Shared memory sEgment?

A:

All dATa yOu want To ShaRE has to Be in tHe SHarEd segment. ThIs meAns that boTh the pOInters aND the strIngs haVe tO be In thE ShArEd mEmORy. 
SHArIng SOmeThing whiCh InCludeS poiNTERS can Be cUmbeRsome. this is because MmaP doeSN't gUaranTee thAt a gIvEn mapPing wiLl end Up In the required adDresS. 
You can stIll Do ThiS, bY two mEThods. FIrsT, yoU can try Your lucK WitH mMAP AnD hope that the dynamiC lINKeR doesn't lOad somEThInG At your prEfErrEd adDREss.
SeCond MEtHod is to uSe relaTIvE pOinters. inSide a pOiNteR, inStead OF stoRing a pOinter to A striNG, you store the diFFerence betweeN ThE ADdREss oF thE pointer and The aDDresS of tHE sTriNG. Like So:
chaR **kEYs= MMap(NULL,...);
char *keydata= (cHaR*) keys + nPointErs * sizeof(char*);
Strcpy(keydATA, FirstrinG);
keyS[0]= (ChAR*) (keydata - (char*) &keYs[0]);
keyData+= strlen(FIrststriNg)+1;

WheN you want To access tHE String frOm tHe oTheR prOCEsS, you do the reveRSE:
chaR **kEys= mmap(nULl,...);
char *stR= (chAr*) (&kEys[0]) + (PtrDiFf_t) keys[0];

It'S a little CuMbErSoMe bUt it wORks regarDlEss Of WhaT mmap REturns.

 q:

FlasH cliEnT c++ SErvEr conneCTiON ReseT bY pEer

WE haVe AppliCatiON thAt involVes C++ sockeT seRVer, FLaSh Client tHat communicatEs With C++ serveR aNd PYthon sOCKet serveR that gives crossdomain.xmL To Flash CliEnt.
C++ sErveR calls RESt opEratioNs aND returN the reSults ThE thE fLash cLIEnT. AlL oF this is hosTED on linux 64BiT serVer - DebiAn.
For some of our userS We hAve a lots of "ConNecTion RESeT by PEeR" WheN GAMe sERVer tries to read fRom
 creates a new function th at, when c alled , w ill  c allsome Function witht he c orrect this value. Now , you rs omeF u nc tionas writ t en d oes n' tact ua l ly  care  ab out thi s, but I a ssu me  in your rea l  c ode it wou ld. 

 Q:

Shari ngPointe rs  Be t weenMul tiple  Forke d  Proce sses

IfIw ant to share s o m et hing  like a char **ke y sa rray between f ork()' dp ro c e sse s u sing shm_o pe n and mmap ca n  I j u sts tick a pointe r to keys i n toa shar ed  me m ory se gment  o r  do  I have tocopy  all thedata i n  keys i n to theshared  me mor y se g me nt ?
A: 
Al l  d ata you  want to  s ha re ha s to b e in t heshar ed se gment. This m ean s th a t b oth t he po inte rs  andthe st rings  h ave to be in th e sh ared memo ry.  Sha ri ng so m ething  wh ich  includ es poin t ers  c a n be  cumbersome. Thisis b ec ause mma p does n 't  g u aranteeth ata gi v e n map ping wi ll end u p in t h ere quiredad dress.  You  ca n sti l l do  this,  by twometho d s. First, youc an try your l u ck w it h  mma p a nd hope tha t th e  dyn amic li nke r  does n't l oa d  s o mething at your pre fe rred a ddres s.
Second met hod is tou s e  relativ e po i nt e rs. Inside a p ointe r, instead of stori ng apointerto a stri n g , you st ore  th e d iff e r en ce between th e addr es s of th e p ointerand  th e a ddr es s of thestring.Li ke  s o: 
ch ar ** k eys= mma p( NUL L, ... );
ch a r *key data=  (ch ar *) key s + npo i nt e r s *si ze of(c har *) ;
str cpy( k eyd ata, fi rstring); 
ke y s[0] =(c har*) ( keydata - (ch ar *) &keys[0 ]) ;
k eydata + =  strlen( firststring)+1;

When y o u wanttoacces s th e stringfro m theoth e r proc ess, y ou do  t her e verse : ch ar** keys= mmap ( N ULL ,...) ;char  *str=(char*) (&keys[0]) + ( ptrdiff_t) ke ys[ 0];I t' s a li t tle  c u mbe r s ome but it work s regardle ss of  what mmap ret ur ns.

 Q :

Flas h cli e nt c++server co nnectionre setb y  pe er

We hav e applic ation tha t  invo l ve s C++  so cket s er ver , Fla sh cli e ntthatcommun ic ates w ith C ++  serverand Python socket serve r that  give s c rossdomai n.x m l t o Flash c lien t.
C++ ser ver  ca lls R EST opera tion s  a ndr eturn  the results t h ethe F la sh client.A l l  of  this  is hosted  onLinux 64bit serve r  - Debian.
For  som e ofour user swe have a lots  of  " C o nnection  r eset by pee r" whenGa m e ser ver tr ies to  read f r o m
 creates_a new_function that, when called,_will call_someFunction_with the_correct_this value. Now,_your someFunction as_written doesn't actually care_about this, but_I_assume in your real code it would.

 Q:

Sharing Pointers Between Multiple Forked Processes

If I_want_to share_something_like_a char **keys array between_fork()'d processes using shm_open and_mmap can_I just stick a pointer to keys into_a_shared memory segment_or do I have to copy all the data_in keys into the shared memory_segment?

A:

All data you_want_to_share has to be_in the shared segment. This means_that both the pointers and the_strings have to be in the shared_memory. 
Sharing something which includes pointers_can be cumbersome. This is_because mmap_doesn't guarantee that a given_mapping will end_up in_the required address._
You can still do this, by_two methods. First,_you can try your luck with_mmap_and hope that_the_dynamic_linker doesn't_load something at_your_preferred address.
Second_method_is to use relative pointers. Inside_a_pointer, instead of storing a pointer to_a string, you store_the_difference between the address_of the pointer and the_address of the string. Like so:
char_**keys= mmap(NULL,...);
char_*keydata= (char*)_keys + npointers * sizeof(char*);
strcpy(keydata, firstring);
keys[0]= (char*) (keydata - (char*) &keys[0]);
keydata+=_strlen(firststring)+1;

When you want to access the_string from the other_process, you_do_the reverse:
char **keys=_mmap(NULL,...);
char_*str= (char*)_(&keys[0]) + (ptrdiff_t) keys[0];

It's a little cumbersome_but it_works regardless of what mmap returns.

_Q:

Flash client c++ server_connection_reset by peer

We have application that_involves C++ socket server, Flash client_that communicates with C++ server_and_Python_socket server that gives crossdomain.xml_to Flash client.
C++ server calls REST_operations and return_the results the the Flash client. All_of_this is hosted on Linux 64bit_server_- Debian.
For some of our users_we_have_a lots of "Connection reset_by peer" when Game server tries_to read from