Update networking layer w/ CURL and emscripten impl

2025-11-08 01:50:36 +11:00
parent a17925904d
commit f6874dc55a
4105 changed files with 694617 additions and 179 deletions
@@ -0,0 +1,77 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLMOPT_MAX_TOTAL_CONNECTIONS
+Section: 3
+Source: libcurl
+See-also:
+  - CURLMOPT_MAXCONNECTS (3)
+  - CURLMOPT_MAX_HOST_CONNECTIONS (3)
+Protocol:
+  - All
+Added-in: 7.30.0
+---
+
+# NAME
+
+CURLMOPT_MAX_TOTAL_CONNECTIONS - max simultaneously open connections
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_TOTAL_CONNECTIONS,
+                            long amount);
+~~~
+
+# DESCRIPTION
+
+Pass a long for the **amount**. The set number is used as the maximum number
+of simultaneously open connections in total using this multi handle. For each
+new session, libcurl might open a new connection up to the limit set by
+CURLMOPT_MAX_TOTAL_CONNECTIONS(3). If CURLMOPT_PIPELINING(3) is enabled,
+libcurl can try multiplexing if the host is capable of it.
+
+When more transfers are added to the multi handle than what can be performed
+due to the set limit, they get queued up waiting for their chance.
+
+While a transfer is queued up internally waiting for a connection, the
+CURLOPT_TIMEOUT_MS(3) timeout is counted inclusive of the waiting time,
+meaning that if you set a too narrow timeout the transfer might never even
+start before it times out. The CURLOPT_CONNECTTIMEOUT_MS(3) time is also
+similarly still treated as a per-connect timeout and might expire even before
+making a new connection is permitted.
+
+Changing this value while there are transfers in progress is possible. The new
+value is then used the next time checks are performed. Lowering the value does
+not close down any active transfers, it simply does not allow new ones to get
+made.
+
+# DEFAULT
+
+0, which means that there is no limit. It is then simply controlled by the
+number of easy handles added concurrently and how much multiplexing is being
+done.
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURLM *m = curl_multi_init();
+  /* never do more than 15 connections */
+  curl_multi_setopt(m, CURLMOPT_MAX_TOTAL_CONNECTIONS, 15L);
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+curl_multi_setopt(3) returns a CURLMcode indicating success or error.
+
+CURLM_OK (0) means everything was OK, non-zero means an error occurred, see
+libcurl-errors(3).