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-rw-r--r--erts/doc/src/erlang.xml40
1 files changed, 14 insertions, 26 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 0963904b83..248b755969 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -2863,6 +2863,10 @@ os_prompt% </pre>
<p>It can only be used to check the local time of day if
the time-zone info of the underlying operating system is
properly configured.</p>
+ <p>If you do not need the return value to be unique and
+ monotonically increasing, use
+ <seealso marker="kernel:os#timestamp/0">os:timestamp/0</seealso>
+ instead to avoid some overhead.</p>
</desc>
</func>
<func>
@@ -3035,8 +3039,11 @@ os_prompt% </pre>
port process. Both <c>Name</c> and <c>Val</c> must be
strings. The one exception is <c>Val</c> being the atom
<c>false</c> (in analogy with <c>os:getenv/1</c>), which
- removes the environment variable. Not available on
- VxWorks.</p>
+ removes the environment variable.</p>
+ <p>If Unicode filename encoding is in effect (see the <seealso
+ marker="erts:erl#file_name_encoding">erl manual
+ page</seealso>), the strings (both <c>Name</c> and
+ <c>Value</c>) may contain characters with codepoints > 255.</p>
</item>
<tag><c>{args, [ string() ]}</c></tag>
<item>
@@ -3573,6 +3580,10 @@ os_prompt% </pre>
<p><c>Bytes</c> is the total number of bytes written to
the port.</p>
</item>
+ <tag><c>{os_pid, Integer | undefined}</c></tag>
+ <item>
+ <p><c>Integer</c> is the process identifier (or equivalent) of an OS process created with <c>open_port({spawn | spawn_executable, Command}, Options)</c>. If the port is not the result of spawning an OS process, the value is <c>undefined</c>.</p>
+ </item>
</taglist>
<p>Failure: <c>badarg</c> if <c>Port</c> is not a local port.</p>
</desc>
@@ -4005,14 +4016,6 @@ os_prompt% </pre>
<p><c>Size</c> is the size in bytes of the process. This
includes call stack, heap and internal structures.</p>
</item>
- <tag><c>{message_binary, BinInfo}</c></tag>
- <item>
- <p><c>BinInfo</c> is a list containing miscellaneous information
- about binaries currently being referred to by the message
- area. This <c>InfoTuple</c> is only valid on an emulator
- using the hybrid heap type. This <c>InfoTuple</c> may be
- changed or removed without prior notice.</p>
- </item>
<tag><c>{message_queue_len, MessageQueueLen}</c></tag>
<item>
<p><c>MessageQueueLen</c> is the number of messages
@@ -5799,10 +5802,6 @@ ok
can spawn a process that does not use the default
settings.</p>
</item>
- <tag><c>global_heaps_size</c></tag>
- <item>
- <p>Returns the current size of the shared (global) heap.</p>
- </item>
<tag><c>heap_sizes</c></tag>
<item>
<p>Returns a list of integers representing valid heap sizes
@@ -5812,7 +5811,7 @@ ok
<tag><c>heap_type</c></tag>
<item>
<p>Returns the heap type used by the current emulator.
- Currently the following heap types exist:</p>
+ Currently only the following heap type exists:</p>
<taglist>
<tag><c>private</c></tag>
<item>
@@ -5821,17 +5820,6 @@ ok
allowed. Messages passed between processes are copied
between heaps.</p>
</item>
- <tag><c>shared</c></tag>
- <item>
- <p>One heap for use by all processes. Messages passed
- between processes are passed by reference.</p>
- </item>
- <tag><c>hybrid</c></tag>
- <item>
- <p>A hybrid of the <c>private</c> and <c>shared</c> heap
- types. A shared heap as well as private heaps are
- used.</p>
- </item>
</taglist>
</item>
<tag><c>info</c></tag>