add peer-to-peer file sharing plugin ZSync

frontend/ui/message/filemessagequeue.lua

@@ -0,0 +1,45 @@
+local ffi = require("ffi")
+local DEBUG = require("dbg")
+local util = require("ffi/util")
+local Event = require("ui/event")
+local MessageQueue = require("ui/message/messagequeue")
+
+local dummy = require("ffi/zeromq_h")
+local filemq = ffi.load("libs/libfmq.so.1")
+
+local FileMessageQueue = MessageQueue:new{
+    client = nil,
+    server = nil,
+}
+
+function FileMessageQueue:init()
+    if self.client ~= nil then
+        self.fmq_recv = filemq.fmq_client_recv_nowait
+        self.filemq = self.client
+    elseif self.server ~= nil then
+        self.fmq_recv = filemq.fmq_server_recv_nowait
+        self.filemq = self.server
+    end
+end
+
+function FileMessageQueue:stop()
+    if self.client ~= nil then
+        DEBUG("stop filemq client")
+        filemq.fmq_client_destroy(ffi.new('fmq_client_t *[1]', self.client))
+    end
+    if self.server ~= nil then
+        DEBUG("stop filemq server")
+        filemq.fmq_server_destroy(ffi.new('fmq_server_t *[1]', self.server))
+    end
+end
+
+function FileMessageQueue:waitEvent()
+    local msg = self.fmq_recv(self.filemq)
+    while msg ~= nil do
+        table.insert(self.messages, msg)
+        msg = self.fmq_recv(self.filemq)
+    end
+    return self:handleZMsgs(self.messages)
+end
+
+return FileMessageQueue