Threads that attempt to acquire a lock in use go to sleep until the thread holding the lock releases it.

 
  • 那些試圖訪(fǎng)問(wèn)一個(gè)上鎖對象的線(xiàn)程通常會(huì )進(jìn)入睡眠狀態(tài),直到上鎖的線(xiàn)程開(kāi)鎖。
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