| 41. | In the 1840s, a semaphore station was installed on the palace.
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| 42. | "Black and White " sends out some messages with semaphores.
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| 43. | Semaphore president Robert Meyrowitz said promoters have taken precautions to protect the fighters.
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| 44. | When it is locked, tasks must wait for the semaphore to unlock.
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| 45. | A binary semaphore is therefore equivalent to a mutex.
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| 46. | Typically a task will set a timeout on its wait for a semaphore.
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| 47. | The traditional semaphore turn signals were replaced by conventional flashing directional indicators worldwide.
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| 48. | Semaphore lines were a precursor of the electrical telegraph.
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| 49. | This means that processes do not waste time checking the semaphore value unnecessarily.
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| 50. | The simplest type of lock is a binary semaphore.
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