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提交 df025c79 创建 作者: Robert Morris's avatar Robert Morris
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start at a shell that will someday run stuff intelligently in parallel

上级 fb099945
隐藏空白字符变更
内嵌 并排
正在显示 包含 109 行增加 和 22 行删除
bin/Makefrag
浏览文件 @ df025c79
......@@ -24,6 +24,7 @@ UPROGS= \
scripttest \
ftest \
wqsh \
cp \
perf \
xls
# pdu
......
bin/cp.cc 0 → 100644
浏览文件 @ df025c79
#include "types.h"
#include "user.h"
#include "fcntl.h"
int
main(int argc, char *argv[])
{
if(argc != 3){
printf("Usage: cp fromfile tofile\n");
exit();
}
int fd1 = open(argv[1], 0);
if(fd1 < 0){
printf("cp: cannot open %s\n", argv[1]);
exit();
}
int fd2 = open(argv[2], O_CREATE|O_WRONLY);
if(fd2 < 0){
printf("cp: cannot create %s\n", argv[2]);
exit();
}
int n;
char buf[512];
while((n = read(fd1, buf, sizeof(buf))) > 0){
if(write(fd2, buf, n) != n){
printf("cp: write failed\n");
exit();
}
}
exit();
}
bin/wqsh.cc
浏览文件 @ df025c79
#include "types.h"
#include "user.h"
#include "fcntl.h"
#include "wq.hh"
class thing {
protected:
int done;
public:
static void * operator new(unsigned long n){
return malloc(n);
......@@ -10,38 +13,45 @@ public:
static void operator delete(void *p){
free(p);
}
virtual void print();
thing() { done = 0; }
virtual ~thing();
virtual void print() = 0;
virtual void run() = 0;
int checkdone() { return done; }
};
class cmd : public thing {
public:
cmd();
virtual ~cmd();
private:
int argc;
char *argv[20];
public:
cmd() { argc = 0; }
void print();
void run();
static cmd *parse();
};
class sequence : public thing {
public:
sequence();
virtual ~sequence();
private:
int n;
class cmd *a[20];
public:
sequence() { n = 0; }
void print();
void run();
static sequence *parse();
};
cmd::cmd()
thing::~thing()
{
argc = 0;
}
cmd::~cmd()
int
isspace(char c)
{
return c == ' ' || c == '\t' || c == '\n' || c == '\r';
}
cmd *
......@@ -55,7 +65,7 @@ cmd::parse()
cmd *c = new cmd();
for(int i = 0; buf[i]; ){
int j;
for(j = i; buf[j] && buf[j] != ' '; j++)
for(j = i; buf[j] && !isspace(buf[j]); j++)
;
char *p = (char *) malloc(j - i + 1);
......@@ -65,7 +75,7 @@ cmd::parse()
assert(c->argc < 20);
c->argv[c->argc++] = p;
while(buf[j] == ' ')
while(isspace(buf[j]))
j++;
i = j;
}
......@@ -73,6 +83,25 @@ cmd::parse()
}
void
cmd::run()
{
int pid = fork(0);
if(pid < 0){
printf("fork failed\n");
exit();
}
if(pid == 0){
argv[argc] = 0;
exec(argv[0], (const char **) argv);
printf("exec failed\n");
exit();
} else {
wait();
done = 1;
}
}
void
cmd::print()
{
for(int i = 0; i < argc; i++)
......@@ -80,15 +109,6 @@ cmd::print()
printf("\n");
}
sequence::sequence()
{
n = 0;
}
sequence::~sequence()
{
}
sequence *
sequence::parse()
{
......@@ -103,6 +123,36 @@ sequence::parse()
}
void
blah(void *x)
{
thing *t = (thing *) x;
t->run();
}
void
sequence::run()
{
for(int i = 0; i < n; i++){
cwork *w = new cwork();
w->rip = (void*) blah;
w->arg0 = a[i];
wq_push(w);
}
while(1){
int do_more = 0;
for(int i = 0; i < n; i++){
if(a[i]->checkdone() == 0){
do_more += 1;
}
}
if(do_more == 0)
break;
wq_trywork();
}
done = 1;
}
void
sequence::print()
{
for(int i = 0; i < n; i++)
......@@ -112,8 +162,9 @@ sequence::print()
int
main(void)
{
initwq();
sequence *s = sequence::parse();
if(s){
s->print();
s->run();
}
}
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