78 lines
2.5 KiB
Python
78 lines
2.5 KiB
Python
#import shared
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#import time
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#from multiprocessing import Pool, cpu_count
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import hashlib
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from struct import unpack, pack
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import sys
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from shared import config
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#import os
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def _set_idle():
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if 'linux' in sys.platform:
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import os
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os.nice(20) # @UndefinedVariable
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else:
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try:
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sys.getwindowsversion()
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import win32api,win32process,win32con # @UnresolvedImport
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pid = win32api.GetCurrentProcessId()
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handle = win32api.OpenProcess(win32con.PROCESS_ALL_ACCESS, True, pid)
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win32process.SetPriorityClass(handle, win32process.IDLE_PRIORITY_CLASS)
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except:
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#Windows 64-bit
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pass
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def _pool_worker(nonce, initialHash, target, pool_size):
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_set_idle()
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trialValue = 99999999999999999999
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while trialValue > target:
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nonce += pool_size
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trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
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return [trialValue, nonce]
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def _doSafePoW(target, initialHash):
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nonce = 0
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trialValue = 99999999999999999999
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while trialValue > target:
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nonce += 1
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trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
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return [trialValue, nonce]
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def _doFastPoW(target, initialHash):
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import shared
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import time
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from multiprocessing import Pool, cpu_count
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try:
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pool_size = cpu_count()
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except:
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pool_size = 4
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try:
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maxCores = config.getint('bitmessagesettings', 'maxcores')
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except:
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maxCores = 99999
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if pool_size > maxCores:
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pool_size = maxCores
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pool = Pool(processes=pool_size)
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result = []
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for i in range(pool_size):
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result.append(pool.apply_async(_pool_worker, args = (i, initialHash, target, pool_size)))
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while True:
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if shared.shutdown:
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pool.terminate()
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while True:
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time.sleep(10) # Don't let this thread return here; it will return nothing and cause an exception in bitmessagemain.py
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return
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for i in range(pool_size):
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if result[i].ready():
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result = result[i].get()
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pool.terminate()
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pool.join() #Wait for the workers to exit...
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return result[0], result[1]
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time.sleep(0.2)
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def run(target, initialHash):
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if 'linux' in sys.platform:
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return _doFastPoW(target, initialHash)
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else:
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return _doSafePoW(target, initialHash)
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