diff options
Diffstat (limited to 'system/doc/getting_started/conc_prog.xml')
| -rw-r--r-- | system/doc/getting_started/conc_prog.xml | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/system/doc/getting_started/conc_prog.xml b/system/doc/getting_started/conc_prog.xml index 15feaa9044..2b64826a93 100644 --- a/system/doc/getting_started/conc_prog.xml +++ b/system/doc/getting_started/conc_prog.xml @@ -95,7 +95,7 @@ goodbye</pre> the second a "goodbye", the first another "hello" and so forth. But where did the <0.63.0> come from? The return value of a function is of course the return value of the last "thing" in - the function. The last thing in the function <c>start</c> is</p> + the function. The last thing in the function <c>start</c> is:</p> <code type="none"> spawn(tut14, say_something, [goodbye, 3]).</code> <p><c>spawn</c> returns a <em>process identifier</em>, or @@ -166,11 +166,11 @@ Pong_PID = spawn(tut15, pong, [])</code> <c>start</c> now creates another process "ping".</p> <code type="none"> spawn(tut15, ping, [3, Pong_PID]),</code> - <p>this process executes</p> + <p>This process executes:</p> <code type="none"> tut15:ping(3, Pong_PID)</code> <p><0.36.0> is the return value from the <c>start</c> function.</p> - <p>The process "pong" now does:</p> + <p>The process "pong" now does:</p> <code type="none"> receive finished -> @@ -235,7 +235,7 @@ Ping_PID ! pong</code> Pid ! Message</code> <p>I.e. <c>Message</c> (any Erlang term) is sent to the process with identity <c>Pid</c>.</p> - <p>After sending the message <c>pong</c>, to the process "ping", + <p>After sending the message <c>pong</c> to the process "ping", "pong" calls the <c>pong</c> function again, which causes it to get back to the <c>receive</c> again and wait for another message. Now let's look at the process "ping". Recall that it was started @@ -253,7 +253,7 @@ Pong_PID ! {ping, self()},</code> <p><c>self()</c> returns the pid of the process which executes <c>self()</c>, in this case the pid of "ping". (Recall the code for "pong", this will land up in the variable <c>Ping_PID</c> in - the <c>receive</c> previously explained).</p> + the <c>receive</c> previously explained.)</p> <p>"Ping" now waits for a reply from "pong":</p> <code type="none"> receive @@ -364,7 +364,7 @@ pong ! {ping, self()},</code> <c>.erlang.cookie</c> in the directory you get to after executing the command <c>cd</c> without any argument). The <c>.erlang.cookie</c> file should contain one line with - the same atom. For example on Linux or Unix in the OS shell:</p> + the same atom. For example, on Linux or Unix in the OS shell:</p> <pre> $ <input>cd</input> $ <input>cat > .erlang.cookie</input> @@ -373,7 +373,7 @@ $ <input>chmod 400 .erlang.cookie</input></pre> <p>The <c>chmod</c> above make the <c>.erlang.cookie</c> file accessible only by the owner of the file. This is a requirement.</p> <p>When you start an Erlang system which is going to talk to other - Erlang systems, you must give it a name, eg: </p> + Erlang systems, you must give it a name, e.g.: </p> <pre> $ <input>erl -sname my_name</input></pre> <p>We will see more details of this later. If you want to @@ -385,7 +385,7 @@ $ <input>erl -sname my_name</input></pre> IP domain and we can use only the first component of the IP address, if we want to use nodes in different domains we use <c>-name</c> instead, but then all IP address must be given in - full.</p> + full.)</p> <p>Here is the ping pong example modified to run on two separate nodes:</p> <code type="none"> @@ -538,7 +538,7 @@ ping finished</pre> <p>Before we start, let's note the following:</p> <list type="bulleted"> <item> - <p>This example will just show the message passing logic- no + <p>This example will just show the message passing logic - no attempt at all has been made to provide a nice graphical user interface. This can, of course, also be done in Erlang - but that's another tutorial.</p> @@ -571,7 +571,7 @@ ping finished</pre> %%% already logged in at the same node, login will be rejected %%% with a suitable error message. %%% logoff() -%%% Logs off anybody at at node +%%% Logs off anybody at that node %%% message(ToName, Message) %%% sends Message to ToName. Error messages if the user of this %%% function is not logged on or if ToName is not logged on at |