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20 lines
665 B
Markdown
20 lines
665 B
Markdown
---
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title: "mg_broadcast()"
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decl_name: "mg_broadcast"
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symbol_kind: "func"
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signature: |
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void mg_broadcast(struct mg_mgr *, mg_event_handler_t func, void *, size_t);
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---
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Pass a message of a given length to all connections.
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Must be called from a thread that does NOT call `mg_mgr_poll()`.
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Note that `mg_broadcast()` is the only function
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that can be, and must be, called from a different (non-IO) thread.
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`func` callback function will be called by the IO thread for each
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connection. When called, event would be `MG_EV_POLL`, and message will
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be passed as `ev_data` pointer. Maximum message size is capped
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by `MG_CTL_MSG_MESSAGE_SIZE` which is set to 8192 bytes.
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