ADT
arm-eh
ast-experimental
enum
forall-pointer-decay
jacob/cs343-translation
jenkins-sandbox
new-ast
new-ast-unique-expr
pthread-emulation
qualifiedEnum
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Last change
on this file since 40cac90 was d7a02ae, checked in by Peter A. Buhr <pabuhr@…>, 6 years ago |
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first complete draft of new concurrency paper
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-
Property mode
set to
100644
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File size:
1.4 KB
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| 1 | #include <stdio.h>
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| 2 |
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| 3 | typedef struct PingPong {
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| 4 | const char * name;
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| 5 | int N, i;
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| 6 | struct PingPong * partner;
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| 7 | void * next;
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| 8 | } PingPong;
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| 9 | #define PPCtor( name, N ) { name, N, 0, NULL, NULL }
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| 10 | void comain( PingPong * pp ) __attribute__(( noinline ));
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| 11 | void comain( PingPong * pp ) {
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| 12 | if ( __builtin_expect(pp->next != 0, 1) ) goto *pp->next;
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| 13 | #if 0
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| 14 | pp->next = &&here;
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| 15 | asm( "mov %0,%%rdi" : "=m" (pp) );
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| 16 | asm( "mov %rdi,%rax" );
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| 17 | #ifndef OPT
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| 18 | #ifdef PRINT
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| 19 | asm( "add $16, %rsp" );
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| 20 | #endif // PRINT
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| 21 | asm( "popq %rbp" );
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| 22 | #endif // ! OPT
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| 23 |
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| 24 | #ifdef OPT
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| 25 | #ifdef PRINT
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| 26 | asm( "popq %rbx" );
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| 27 | #endif // PRINT
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| 28 | #endif // OPT
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| 29 | asm( "jmp comain" );
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| 30 | here: ;
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| 31 | #endif // 0
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| 32 |
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| 33 | pp->next = &&cycle;
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| 34 | for ( ; pp->i < pp->N; pp->i += 1 ) {
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| 35 | #ifdef PRINT
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| 36 | printf( "%s %d\n", pp->name, pp->i );
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| 37 | #endif // PRINT
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| 38 | asm( "mov %0,%%rdi" : "=m" (pp->partner) );
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| 39 | asm( "mov %rdi,%rax" );
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| 40 | #ifndef OPT
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| 41 | #ifdef PRINT
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| 42 | asm( "add $16, %rsp" );
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| 43 | #endif // PRINT
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| 44 | asm( "popq %rbp" );
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| 45 | #endif // ! OPT
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| 46 |
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| 47 | #ifdef OPT
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| 48 | #ifdef PRINT
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| 49 | asm( "popq %rbx" );
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| 50 | #endif // PRINT
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| 51 | #endif // OPT
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| 52 | asm( "jmp comain" );
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| 53 | cycle: ;
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| 54 | } // for
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| 55 | }
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| 56 |
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| 57 | int main() {
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| 58 | enum { N =
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| 59 | #ifdef PRINT
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| 60 | 5
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| 61 | #else
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| 62 | 1000000000
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| 63 | #endif // PRINT
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| 64 | };
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| 65 | PingPong ping = PPCtor( "ping", N ), pong = PPCtor( "pong", N );
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| 66 | ping.partner = &pong; pong.partner = &ping;
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| 67 | comain( &ping );
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| 68 | }
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| 69 |
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| 70 | // Local Variables: //
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| 71 | // tab-width: 4 //
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| 72 | // compile-command: "gcc-8 -g -DPRINT PingPong.c" //
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| 73 | // End: //
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