new external chapter

Steve Huss-Lederman (lederman@cs.wisc.edu)
Fri, 2 Aug 1996 13:03:27 -0500

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Attached is the postscript for the latest chapter. We still have
decisions to go and are scheduled for a vote at the next meeting.
Please read this over and make comments. I know there are mistakes.

Steve
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eop
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eop
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%%Page: 18 20
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%%Page: 19 21
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%%Page: 20 22
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1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
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23 24 bop 75 -100 a Fk(6.7.)34 b(CA)o(CHING)15 b(ON)h(MPI)f(HANDLES)
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(HANDLE_TYPE,)f(KEYVAL,)h(EXTRA_STATE,)f(ATTRIBUTE_VAL_IN,)75
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1743 y(void)g(*attribute_val,)f(void)h(*extra_state\);)1875
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159 y(3)-32 215 y(4)-32 272 y(5)-32 328 y(6)-32 385 y(7)-32
441 y(8)-32 498 y(9)-40 554 y(10)-40 611 y(11)-40 667
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%%Page: 24 26
24 25 bop 75 -100 a Fr(24)871 b Fk(CHAPTER)15 b(6.)35
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13 2 v 14 w(KEYV)m(AL)p 1624 277 V 14 w(CREA)m(TE)117
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676 V 17 w(TYPE,)g(KEYVAL,)g(ATTRIBUTE)p 1266 676 V 16
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549 762 V 17 w(put\(MPI::HANDLE)f(*handle,)g(int)i(handle)p
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b Fi(k)o(ey)14 b(v)n(alue)f(\(in)o(teger\))117 1302 y(OUT)108
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966 2081 V 18 w(t)o(yp)q(e,)h(k)o(eyval\))117 2159 y
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443 2234 V 18 w(t)o(yp)q(e)367 b Fi(t)o(yp)q(e)15 b(of)e
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75 2433 y Fg(int)23 b(MPI)p 245 2433 15 2 v 17 w(Handle)p
406 2433 V 17 w(attr)p 519 2433 V 16 w(delete\(MPI)p
775 2433 V 16 w(Handle)g(*handle,)g(MPI)p 1245 2433 V
17 w(Handle)p 1406 2433 V 16 w(type)g(handle)p 1685 2433
V 17 w(type,)393 2490 y(int)h(keyval\))75 2576 y(MPI)p
150 2576 V 17 w(HANDLE)p 311 2576 V 16 w(ATTR)p 423 2576
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2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
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25 26 bop 75 -100 a Fk(6.7.)34 b(CA)o(CHING)15 b(ON)h(MPI)f(HANDLES)
1005 b Fr(25)75 49 y Fg(int)23 b(MPI::Handle)p 437 49
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w(HANDLE)p 2023 192 V 15 w(GROUP)p Fr(,)75 249 y Fh(MPI)p
152 249 V 14 w(HANDLE)p 329 249 V 16 w(PREQUEST)p Fr(,)16
b(or)i Fh(MPI)p 723 249 V 15 w(HANDLE)p 901 249 V 15
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(datat)o(yp)q(e,)75 305 y(group,)c(p)q(ersisten)o(t)g(request,)g(or)g
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509 y(of)g(t)o(yp)q(e)g Fh(MPI)p 414 509 V 14 w(Handle)i
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2699 y(48)p eop
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26 27 bop 75 -100 a Fr(26)871 b Fk(CHAPTER)15 b(6.)35
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y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
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1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
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2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
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46 y Fm(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272
y(5)-32 328 y(6)-32 385 y(7)-32 441 y(8)-32 498 y(9)-40
554 y(10)-40 611 y(11)-40 667 y(12)-40 724 y(13)-40 780
y(14)-40 836 y(15)-40 893 y(16)-40 949 y(17)-40 1006
y(18)-40 1062 y(19)-40 1119 y(20)-40 1175 y(21)-40 1232
y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40 1457
y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40 1683
y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40 1909
y(34)-40 1966 y(35)-40 2022 y(36)-40 2078 y(37)-40 2135
y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40 2361
y(42)-40 2417 y(43)-40 2474 y(44)-40 2530 y(45)-40 2587
y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Page: 34 36
34 35 bop 75 -100 a Fr(34)871 b Fk(CHAPTER)15 b(6.)35
b(EXTERNAL)16 b(INTERF)-5 b(A)o(CES)166 49 y Fi(\(2\))19
b(Multiple)f(con)o(tin)o(uations)g(w)o(aiting)f(to)i(execute)i(when)e
(the)g(comm)o(unication)d(completes.)32 b(In)19 b(suc)o(h)75
99 y(case,)c(w)o(e)g(could)f(ha)o(v)o(e)h(m)o(ultiple)d(handlers)j(p)q
(osted)g(on)g(the)g(same)f(request)i(\(a)e(new)h(mec)o(hanisms)e(is)h
(needed)i(to)75 149 y(\\unp)q(ost")i(them\),)f(as)g(w)o(ell)g(as)h(m)o
(ultiple)d(threads)k(w)o(aiting)d(on)h(the)h(same)f(request,)i(or)f(an)
o(y)f(com)o(bination)e(of)75 199 y(b)q(oth.)26 b(In)16
b(the)h(later)g(case,)g(w)o(e)g(can)g(sp)q(ecify)g(that)f(these)i(v)n
(arious)e(threads)h(are)g(activ)n(ated)f(in)g(the)h(order)g(they)75
249 y(w)o(ere)e(p)q(osted.)166 305 y(The)f(curren)o(t)i(prop)q(osal)d
(follo)o(ws)f(the)j(\014rst)g(approac)o(h.)75 474 y Fj(6.12.4)49
b(Global)18 b(thread)d(functions)75 560 y Fr(It)j(is)g(useful)h(to)e
(extend)h(thread)g(co)q(ordination)g(functions)g(to)f(w)o(ork)g(across)
g(an)h(MPI)f(group)h(of)f(pro-)75 616 y(cesses,)d(including)i(pro)q
(cesses)e(not)g(under)g(the)g(same)f(k)o(ernel.)20 b(Suc)o(h)15
b(extensions)f(can)g(b)q(e)g(implemen)o(ted)75 673 y(p)q(ortably)k
(using)h(MPI)f(comm)o(unication)h(\(with)f(handlers\))h(and)g(pro)o
(xies)f(at)f(eac)o(h)i(no)q(de)f(to)g(supp)q(ort)75 729
y(the)f(functions)h(globally)g(\(of)e(course,)h(m)o(uc)o(h)g(more)g
(e\016cien)o(t)h(implemen)o(tations)g(will)h(b)q(e)e(p)q(ossible)i(on)
75 786 y(man)o(y)c(systems\).)166 842 y(These)h(functions)g(can)f(also)
g(b)q(e)h(used)g(to)e(sync)o(hronize)j(threads)e(within)h(one)g(pro)q
(cess,)f(using)h(the)75 898 y(comm)o(unicator)f Fl(MPI)p
457 898 14 2 v 16 w(COMM)p 615 898 V 16 w(SELF)p Fr(.)166
955 y(W)l(e)g(outline)i(b)q(elo)o(w)e(some)g(p)q(ossible)i(c)o(hoices.)
75 1075 y Fl(Mutexes)75 1255 y(MPI)p 160 1255 V 16 w(MUTEX)p
335 1255 V 17 w(CREA)l(TE\(comm,)c(mutex)p 799 1255 V
17 w(attr,)i(mutex\))117 1332 y Fi(IN)155 b Fl(comm)470
b Fi(comm)o(unicator)11 b(for)j(group)g(sharing)f(m)o(utex)117
1408 y(IN)155 b Fl(mutex)p 438 1408 V 17 w(attr)383 b
Fi(m)o(utex)13 b(attributes)117 1483 y(OUT)108 b Fl(mutex)470
b Fi(m)o(utex)13 b(ob)r(ject)75 1607 y Fg(int)23 b(MPI)p
245 1607 15 2 v 17 w(Mutex)p 382 1607 V 17 w(create\(MPI)p
639 1607 V 16 w(Comm)g(comm,)g(MPI)p 989 1607 V 17 w(mutex)p
1126 1607 V 16 w(attr)h(mutex)p 1382 1607 V 16 w(attr,)f(MPI)p
1613 1607 V 17 w(mutex)393 1664 y(mutex\))75 1750 y(MPI)p
150 1750 V 17 w(MUTEX)p 287 1750 V 16 w(CREATE\(COMM,)f(MUTEX)p
733 1750 V 17 w(ATTR,)h(MUTEX\))170 1807 y(INTEGER)g(COMM,)h(MUTEX)p
628 1807 V 16 w(ATTR,)f(MUTEX)75 1893 y(int)g(MPI::Mutex)p
413 1893 V 16 w(create\(MPI::Comm)f(comm,)h(MPI::mutex)p
1218 1893 V 16 w(attr)g(mutex)p 1473 1893 V 17 w(attr,)g(MPI::mutex)393
1949 y(mutex\))166 2077 y Ff(Missing:)166 2126 y Fi(need)15
b(to)f(de\014ne)g(what)g(is)g(m)o(utex)p 695 2126 13
2 v 14 w(attr.)166 2230 y Fr(Creates)d(a)g(m)o(utex)g(ob)s(ject)g(that)
g(is)h(shared)g(b)o(y)f(all)i(pro)q(cesses)f(in)g(the)g(group)f(of)g
Fl(comm)p Fr(.)17 b(\(W)l(e)11 b(could,)75 2287 y(instead,)17
b(return)e(a)h Fl(new)o(comm)f Fr(and)h(further)g(o)o(v)o(erload)g
(comm)o(unicators.\))21 b(This)c(is)f(the)h(extension)f(of)75
2343 y Fl(pthread)p 221 2343 14 2 v 18 w(mutex)p 356
2343 V 16 w(init)75 2494 y(MPI)p 160 2494 V 16 w(MUTEX)p
335 2494 V 17 w(FREE\(mutex\))117 2571 y Fi(INOUT)62
b Fl(mutex)470 b Fi(m)o(utex)13 b(ob)r(ject)75 2696 y
Fg(int)23 b(MPI)p 245 2696 15 2 v 17 w(Mutex)p 382 2696
V 17 w(free\(MPI)p 591 2696 V 16 w(Mutex)g(*mutex\))1967
46 y Fm(1)1967 103 y(2)1967 159 y(3)1967 215 y(4)1967
272 y(5)1967 328 y(6)1967 385 y(7)1967 441 y(8)1967 498
y(9)1959 554 y(10)1959 611 y(11)1959 667 y(12)1959 724
y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
y(17)1959 1006 y(18)1959 1062 y(19)1959 1119 y(20)1959
1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 35 37
35 36 bop 75 -100 a Fk(6.12.)34 b(MPI)15 b(AND)g(THREADS)1179
b Fr(35)75 49 y Fg(MPI)p 150 49 15 2 v 17 w(MUTEX)p 287
49 V 16 w(FREE\(MUTEX\))170 106 y(INTEGER)23 b(MUTEX)75
192 y(int)g(MPI::Mutex)p 413 192 V 16 w(free\(MPI::Mutex)f(mutex\))166
279 y Fr(F)l(ree)10 b(the)g(m)o(utex)g(ob)s(ject)g(\(should)h(that)e(b)
q(e)i(collectiv)o(e?\))20 b(This)11 b(is)g(the)f(extension)h(to)e
Fl(pthread)p 1751 279 14 2 v 18 w(mutex)p 1886 279 V
17 w(destro)o(y)75 335 y Fr(\(P)o(osix)16 b(sa)o(ys)g(that)h(the)f(b)q
(eha)o(vior)i(of)e(a)h(pthread)p 932 335 V 16 w(m)o(utex)p
1072 335 V 16 w(destro)o(y)f(call)i(on)f(a)g(lo)q(c)o(k)o(ed)g(m)o
(utex)g(is)g(unde-)75 392 y(\014ned.)j(W)l(e)13 b(can)g(lea)o(v)o(e)h
(it)f(this)g(w)o(a)o(y)l(,)g(or)f(ha)o(v)o(e)h(our)g(usual,)g(more)g
(lenien)o(t)i(implemen)o(tation)f(of)f(free,)g(that)75
448 y(w)o(aits)g(un)o(til)i(ob)s(jects)e(are)g(not)g(busy)l(.)20
b(The)14 b(later)f(is)h(consisten)o(t)g(b)q(oth)g(with)g(P)o(osix)f
(and)h(with)g(MPI,)f(but)75 504 y(ma)o(y)h(not)h(b)q(e)h(consisten)o(t)
g(with)f(curren)o(t)g(implemen)o(tations)i(of)d(P)o(osix)h(threads.\))
75 655 y Fl(MPI)p 160 655 V 16 w(MUTEX)p 335 655 V 17
w(LOCK\(mutex\))117 733 y Fi(IN)155 b Fl(mutex)470 b
Fi(m)o(utex)13 b(to)h(b)q(e)g(lo)q(c)o(k)o(ed)75 857
y Fg(int)23 b(MPI)p 245 857 15 2 v 17 w(Mutex)p 382 857
V 17 w(lock\(MPI)p 591 857 V 16 w(Mutex)g(mutex\))75
944 y(MPI)p 150 944 V 17 w(MUTEX)p 287 944 V 16 w(LOCK\(MUTEX\))170
1000 y(INTEGER)g(MUTEX)75 1086 y(int)g(MPI::Mutex)p 413
1086 V 16 w(lock\(MPI::mutex)f(mutex\))75 1267 y Fl(MPI)p
160 1267 14 2 v 16 w(MUTEX)p 335 1267 V 17 w(TRYLOCK\(mutex,)14
b(\015ag\))117 1345 y Fi(IN)155 b Fl(mutex)470 b Fi(m)o(utex)13
b(to)h(b)q(e)g(lo)q(c)o(k)o(ed)117 1420 y(OUT)108 b Fl(\015ag)518
b Fi(success)17 b(\015ag)c(\(b)q(o)q(olean\))75 1544
y Fg(int)23 b(MPI)p 245 1544 15 2 v 17 w(Mutex)p 382
1544 V 17 w(trylock\(MPI)p 663 1544 V 15 w(Mutex)h(mutex,)f(int)g
(*flag\))75 1631 y(MPI)p 150 1631 V 17 w(MUTEX)p 287
1631 V 16 w(TRYLOCK\(MUTEX,)f(FLAG\))170 1687 y(INTEGER)h(MUTEX,)g
(FLAG)75 1774 y(int)g(MPI::Mutex)p 413 1774 V 16 w(trylock\(MPI::Mutex)
f(mutex,)h(int)g(*flag\))75 1954 y Fl(MPI)p 160 1954
14 2 v 16 w(MUTEX)p 335 1954 V 17 w(UNLOCK\(mutex\))117
2032 y Fi(IN)155 b Fl(mutex)470 b Fi(m)o(utex)13 b(to)h(b)q(e)g(unlo)q
(c)o(k)o(ed)75 2156 y Fg(int)23 b(MPI)p 245 2156 15 2
v 17 w(Mutex)p 382 2156 V 17 w(unlock\(MPI)p 639 2156
V 16 w(Mutex)g(mutex\))75 2243 y(MPI)p 150 2243 V 17
w(MUTEX)p 287 2243 V 16 w(UNLOCK\(MUTEX\))170 2299 y(INTEGER)g(MUTEX)75
2386 y(int)g(MPI::Mutex)p 413 2386 V 16 w(unlock\(MPI::Mutex)f(mutex\))
166 2472 y Fr(These)d(are)g(the)f(extensions)i(of)e(the)h(P)o(osix)g
(calls)h Fl(pthread)p 1199 2472 14 2 v 17 w(mutex)p 1333
2472 V 17 w(lo)q(ck,)f(pthread)p 1602 2472 V 18 w(mutex)p
1737 2472 V 17 w(unlo)q(ck)75 2528 y Fr(and)k Fl(pthread)p
317 2528 V 18 w(mutex)p 452 2528 V 16 w(unlo)q(ck)p Fr(.)43
b(The)23 b(lo)q(c)o(k)g(call)g(is)g(blo)q(c)o(king)h(\(lik)o(e)g(a)e(w)
o(ait\),)h(whereas)f(the)h(trylo)q(c)o(k)75 2585 y(function)16
b(in)g(non)o(blo)q(c)o(king,)g(lik)o(e)h(a)d(test.)-32
46 y Fm(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272
y(5)-32 328 y(6)-32 385 y(7)-32 441 y(8)-32 498 y(9)-40
554 y(10)-40 611 y(11)-40 667 y(12)-40 724 y(13)-40 780
y(14)-40 836 y(15)-40 893 y(16)-40 949 y(17)-40 1006
y(18)-40 1062 y(19)-40 1119 y(20)-40 1175 y(21)-40 1232
y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40 1457
y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40 1683
y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40 1909
y(34)-40 1966 y(35)-40 2022 y(36)-40 2078 y(37)-40 2135
y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40 2361
y(42)-40 2417 y(43)-40 2474 y(44)-40 2530 y(45)-40 2587
y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Page: 36 38
36 37 bop 75 -100 a Fr(36)871 b Fk(CHAPTER)15 b(6.)35
b(EXTERNAL)16 b(INTERF)-5 b(A)o(CES)75 49 y Fl(Condition)16
b(va)o(riables)75 230 y(MPI)p 160 230 14 2 v 16 w(COND)p
303 230 V 17 w(CREA)l(TE\(comm,)d(cond)p 739 230 V 18
w(attr,)i(cond\))117 307 y Fi(IN)155 b Fl(comm)470 b
Fi(comm)o(unicator)11 b(for)j(group)g(sharing)f(condition)g(v)n
(ariable)117 382 y(IN)155 b Fl(cond)p 410 382 V 18 w(attr)410
b Fi(condition)13 b(attributes)117 457 y(OUT)108 b Fl(cond)498
b Fi(condition)13 b(ob)r(ject)75 581 y Fg(int)23 b(MPI)p
245 581 15 2 v 17 w(Cond)p 358 581 V 17 w(create\(MPI)p
615 581 V 16 w(Comm)g(comm,)g(MPI)p 965 581 V 17 w(Cond)p
1078 581 V 17 w(attr)g(cond)p 1310 581 V 17 w(attr,)g(MPI)p
1542 581 V 16 w(Cond)h(*cond\))75 668 y(MPI)p 150 668
V 17 w(COND)p 263 668 V 16 w(CREATE\(COMM,)f(COND)p 686
668 V 16 w(ATTR,)g(COND\))170 724 y(INTEGER)g(COMM,)h(COND)p
604 724 V 16 w(ATTR,)f(COND)75 811 y(int)g(MPI::Cond)p
389 811 V 16 w(create\(MPI::Comm)f(comm,)h(MPI::Cond)p
1170 811 V 16 w(attr)h(cond)p 1402 811 V 16 w(attr,)f(MPI::Cond)393
867 y(*cond\))166 954 y Fr(Creates)13 b(a)h(condition)i(v)m(ariable)f
(that)e(is)i(shared)f(b)o(y)g(all)h(pro)q(cesses)g(in)g(the)f(group)g
(of)g Fl(comm)p Fr(.)j(\(W)l(e)75 1010 y(could,)f(here,)f(to)q(o,)f(o)o
(v)o(erload)h(comm)o(unicators,)f(rah)o(ter)h(than)g(ha)o(ving)g(a)g
(new)h(opaque)f(ob)s(ject.\))75 1161 y Fl(MPI)p 160 1161
14 2 v 16 w(COND)p 303 1161 V 17 w(FREE\(cond\))117 1238
y Fi(INOUT)62 b Fl(cond)498 b Fi(condition)13 b(ob)r(ject)75
1363 y Fg(int)23 b(MPI)p 245 1363 15 2 v 17 w(Cond)p
358 1363 V 17 w(free\(MPI)p 567 1363 V 16 w(Cond)g(*cond\))75
1449 y(MPI)p 150 1449 V 17 w(COND)p 263 1449 V 16 w(FREE\(COND\))170
1506 y(INTEGER)g(COND)75 1592 y(int)g(MPI::Cond)p 389
1592 V 16 w(free\(MPI::Cond)f(*cond\))166 1679 y Fr(F)l(ree)15
b(the)g(condition)i(ob)s(ject.)166 1735 y(These)e(are)g(the)h(MPI)f
(extensions)h(to)e Fl(pthread)p 976 1735 14 2 v 18 w(cond)p
1083 1735 V 17 w(init)i Fr(and)g Fl(pthread)p 1409 1735
V 17 w(cond)p 1515 1735 V 18 w(destro)o(y)p Fr(.)75 1886
y Fl(MPI)p 160 1886 V 16 w(COND)p 303 1886 V 17 w(SIGNAL\(cond\))117
1963 y Fi(IN)155 b Fl(cond)498 b Fi(condition)13 b(to)h(b)q(e)h
(signaled)75 2088 y Fg(int)23 b(MPI)p 245 2088 15 2 v
17 w(Cond)p 358 2088 V 17 w(signal\(MPI)p 615 2088 V
16 w(Cond)g(cond\))75 2174 y(MPI)p 150 2174 V 17 w(COND)p
263 2174 V 16 w(SIGNAL\(COND\))170 2231 y(INTEGER)g(COND)75
2317 y(int)g(MPI::Cond)p 389 2317 V 16 w(signal\(MPI::Cond)f(cond\))75
2498 y Fl(MPI)p 160 2498 14 2 v 16 w(COND)p 303 2498
V 17 w(BRO)o(ADCAST\(cond\))117 2575 y Fi(IN)155 b Fl(cond)498
b Fi(condition)13 b(to)h(b)q(e)h(signaled)75 2700 y Fg(int)23
b(MPI)p 245 2700 15 2 v 17 w(Cond)p 358 2700 V 17 w(broadcast\(MPI)p
687 2700 V 15 w(Cond)h(cond\))1967 46 y Fm(1)1967 103
y(2)1967 159 y(3)1967 215 y(4)1967 272 y(5)1967 328 y(6)1967
385 y(7)1967 441 y(8)1967 498 y(9)1959 554 y(10)1959
611 y(11)1959 667 y(12)1959 724 y(13)1959 780 y(14)1959
836 y(15)1959 893 y(16)1959 949 y(17)1959 1006 y(18)1959
1062 y(19)1959 1119 y(20)1959 1175 y(21)1959 1232 y(22)1959
1288 y(23)1959 1345 y(24)1959 1401 y(25)1959 1457 y(26)1959
1514 y(27)1959 1570 y(28)1959 1627 y(29)1959 1683 y(30)1959
1740 y(31)1959 1796 y(32)1959 1853 y(33)1959 1909 y(34)1959
1966 y(35)1959 2022 y(36)1959 2078 y(37)1959 2135 y(38)1959
2191 y(39)1959 2248 y(40)1959 2304 y(41)1959 2361 y(42)1959
2417 y(43)1959 2474 y(44)1959 2530 y(45)1959 2587 y(46)1959
2643 y(47)1959 2699 y(48)p eop
%%Page: 37 39
37 38 bop 75 -100 a Fk(6.12.)34 b(MPI)15 b(AND)g(THREADS)1179
b Fr(37)75 49 y Fg(MPI)p 150 49 15 2 v 17 w(COND)p 263
49 V 16 w(BROADCAST\(COND\))170 106 y(INTEGER)23 b(COND)75
192 y(int)g(MPI::Cond)p 389 192 V 16 w(broadcast\(MPI::Cond)f(cond\))75
373 y Fl(MPI)p 160 373 14 2 v 16 w(COND)p 303 373 V 17
w(W)l(AIT\(cond\))117 450 y Fi(IN)155 b Fl(cond)498 b
Fi(condition)13 b(to)h(w)o(ait)f(on)75 575 y Fg(int)23
b(MPI)p 245 575 15 2 v 17 w(Cond)p 358 575 V 17 w(wait\(MPI)p
567 575 V 16 w(Cond)g(cond\))75 661 y(MPI)p 150 661 V
17 w(COND)p 263 661 V 16 w(WAIT\(COND\))170 718 y(INTEGER)g(COND)166
804 y Fr(These)10 b(are)g(the)g(MPI)h(extensions)f(of)g(the)g(P)o(osix)
g(calls)i Fl(pthread)p 1229 804 14 2 v 18 w(cond)p 1336
804 V 17 w(signal,)f(pthread)p 1627 804 V 18 w(cond)p
1734 804 V 17 w(b)o(roadcast)75 861 y Fr(and)g Fl(pthread)p
305 861 V 18 w(cond)p 412 861 V 17 w(w)o(ait)p Fr(.)18
b(The)11 b(cond)p 721 861 V 17 w(w)o(ait)g(call)g(is)h(blo)q(c)o(king.)
20 b(The)11 b(cond)p 1333 861 V 16 w(signal)h(call)g(un)o(blo)q(c)o(ks)
g(at)e(least)75 917 y(one)17 b(of)f(the)h(threads)f(w)o(aiting)h(on)g
(the)g(condition)h(\(if)f(an)o(y\))f(and)h(the)f(cond)p
1395 917 V 17 w(broadcast)g(call)i(un)o(blo)q(c)o(ks)75
974 y(all)e(threads)f(that)g(are)f(w)o(aiting)i(on)f(the)g(condition.)
166 1077 y Ff(Discussion:)34 b Fi(I)14 b(ha)o(v)o(e)f(left)h(the)g
(extension)h(of)e Fh(pthread)p 1065 1077 13 2 v 17 w(cond)p
1163 1077 V 16 w(timedw)o(ait)h Fi(to)g(the)g(real-time)f(p)q(eople.)
166 1181 y Fr(Prede\014ned)j(attributes)f(will)i(b)q(e)f(pro)o(vided,)g
(b)q(oth)f(for)g(m)o(utexes)g(and)g(for)g(condition)h(v)m(ariables.)-32
46 y Fm(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272
y(5)-32 328 y(6)-32 385 y(7)-32 441 y(8)-32 498 y(9)-40
554 y(10)-40 611 y(11)-40 667 y(12)-40 724 y(13)-40 780
y(14)-40 836 y(15)-40 893 y(16)-40 949 y(17)-40 1006
y(18)-40 1062 y(19)-40 1119 y(20)-40 1175 y(21)-40 1232
y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40 1457
y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40 1683
y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40 1909
y(34)-40 1966 y(35)-40 2022 y(36)-40 2078 y(37)-40 2135
y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40 2361
y(42)-40 2417 y(43)-40 2474 y(44)-40 2530 y(45)-40 2587
y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Trailer
end
userdict /end-hook known{end-hook}if
%%EOF

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