1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161

use std::{fmt, net};
use std::rc::Rc;
use std::sync::Arc;
use std::cell::{Cell, RefCell, RefMut, UnsafeCell};
use futures_cpupool::{Builder, CpuPool};

use helpers;
use super::channel::Node;
use super::shared::{SharedBytes, SharedBytesPool};

/// Various server settings
#[derive(Debug, Clone)]
pub struct ServerSettings {
    addr: Option<net::SocketAddr>,
    secure: bool,
    host: String,
    cpu_pool: Arc<InnerCpuPool>,
}

struct InnerCpuPool {
    cpu_pool: UnsafeCell<Option<CpuPool>>,
}

impl fmt::Debug for InnerCpuPool {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "CpuPool")
    }
}

impl InnerCpuPool {
    fn new() -> Self {
        InnerCpuPool {
            cpu_pool: UnsafeCell::new(None),
        }
    }
    fn cpu_pool(&self) -> &CpuPool {
        unsafe {
            let val = &mut *self.cpu_pool.get();
            if val.is_none() {
                *val = Some(Builder::new().create());
            }
            val.as_ref().unwrap()
        }
    }
}

unsafe impl Sync for InnerCpuPool {}

impl Default for ServerSettings {
    fn default() -> Self {
        ServerSettings {
            addr: None,
            secure: false,
            host: "localhost:8080".to_owned(),
            cpu_pool: Arc::new(InnerCpuPool::new()),
        }
    }
}

impl ServerSettings {
    /// Crate server settings instance
    pub(crate) fn new(addr: Option<net::SocketAddr>, host: &Option<String>, secure: bool)
                      -> ServerSettings
    {
        let host = if let Some(ref host) = *host {
            host.clone()
        } else if let Some(ref addr) = addr {
            format!("{}", addr)
        } else {
            "localhost".to_owned()
        };
        let cpu_pool = Arc::new(InnerCpuPool::new());
        ServerSettings { addr, secure, host, cpu_pool }
    }

    /// Returns the socket address of the local half of this TCP connection
    pub fn local_addr(&self) -> Option<net::SocketAddr> {
        self.addr
    }

    /// Returns true if connection is secure(https)
    pub fn secure(&self) -> bool {
        self.secure
    }

    /// Returns host header value
    pub fn host(&self) -> &str {
        &self.host
    }

    /// Returns default `CpuPool` for server
    pub fn cpu_pool(&self) -> &CpuPool {
        self.cpu_pool.cpu_pool()
    }
}


pub(crate) struct WorkerSettings<H> {
    h: RefCell<Vec<H>>,
    enabled: bool,
    keep_alive: u64,
    bytes: Rc<SharedBytesPool>,
    messages: Rc<helpers::SharedMessagePool>,
    channels: Cell<usize>,
    node: Box<Node<()>>,
}

impl<H> WorkerSettings<H> {
    pub(crate) fn new(h: Vec<H>, keep_alive: Option<u64>) -> WorkerSettings<H> {
        WorkerSettings {
            h: RefCell::new(h),
            enabled: if let Some(ka) = keep_alive { ka > 0 } else { false },
            keep_alive: keep_alive.unwrap_or(0),
            bytes: Rc::new(SharedBytesPool::new()),
            messages: Rc::new(helpers::SharedMessagePool::new()),
            channels: Cell::new(0),
            node: Box::new(Node::head()),
        }
    }

    pub fn num_channels(&self) -> usize {
        self.channels.get()
    }

    pub fn head(&self) -> &Node<()> {
        &self.node
    }

    pub fn handlers(&self) -> RefMut<Vec<H>> {
        self.h.borrow_mut()
    }

    pub fn keep_alive(&self) -> u64 {
        self.keep_alive
    }

    pub fn keep_alive_enabled(&self) -> bool {
        self.enabled
    }

    pub fn get_shared_bytes(&self) -> SharedBytes {
        SharedBytes::new(self.bytes.get_bytes(), Rc::clone(&self.bytes))
    }

    pub fn get_http_message(&self) -> helpers::SharedHttpInnerMessage {
        helpers::SharedHttpInnerMessage::new(self.messages.get(), Rc::clone(&self.messages))
    }

    pub fn add_channel(&self) {
        self.channels.set(self.channels.get() + 1);
    }

    pub fn remove_channel(&self) {
        let num = self.channels.get();
        if num > 0 {
            self.channels.set(num-1);
        } else {
            error!("Number of removed channels is bigger than added channel. Bug in actix-web");
        }
    }
}