mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-27 05:03:37 +00:00
e56303798c
Initial SickGear for Python 3.
104 lines
2.4 KiB
Python
104 lines
2.4 KiB
Python
import gc
|
|
|
|
# ---- Default implementation when resource is missing ----------------------
|
|
PAGE_SIZE = 4096
|
|
|
|
|
|
def getMemoryLimit():
|
|
"""
|
|
Get current memory limit in bytes.
|
|
|
|
Return None on error.
|
|
"""
|
|
return None
|
|
|
|
|
|
def setMemoryLimit(max_mem):
|
|
"""
|
|
Set memory limit in bytes.
|
|
Use value 'None' to disable memory limit.
|
|
|
|
Return True if limit is set, False on error.
|
|
"""
|
|
return False
|
|
|
|
|
|
def getMemorySize():
|
|
"""
|
|
Read currenet process memory size: size of available virtual memory.
|
|
This value is NOT the real memory usage.
|
|
|
|
This function only works on Linux (use /proc/self/statm file).
|
|
"""
|
|
try:
|
|
statm = open('/proc/self/statm').readline().split()
|
|
except IOError:
|
|
return None
|
|
return int(statm[0]) * PAGE_SIZE
|
|
|
|
|
|
def clearCaches():
|
|
"""
|
|
Try to clear all caches: call gc.collect() (Python garbage collector).
|
|
"""
|
|
gc.collect()
|
|
# import re; re.purge()
|
|
|
|
|
|
try:
|
|
# ---- 'resource' implementation -----------------------------------
|
|
from resource import getpagesize, getrlimit, setrlimit, RLIMIT_AS
|
|
|
|
PAGE_SIZE = getpagesize()
|
|
|
|
def getMemoryLimit(): # noqa
|
|
try:
|
|
limit = getrlimit(RLIMIT_AS)[0]
|
|
if 0 < limit:
|
|
limit *= PAGE_SIZE
|
|
return limit
|
|
except ValueError:
|
|
return None
|
|
|
|
def setMemoryLimit(max_mem): # noqa
|
|
if max_mem is None:
|
|
max_mem = -1
|
|
try:
|
|
setrlimit(RLIMIT_AS, (max_mem, -1))
|
|
return True
|
|
except ValueError:
|
|
return False
|
|
except ImportError:
|
|
pass
|
|
|
|
|
|
def limitedMemory(limit, func, *args, **kw):
|
|
"""
|
|
Limit memory grow when calling func(*args, **kw):
|
|
restrict memory grow to 'limit' bytes.
|
|
|
|
Use try/except MemoryError to catch the error.
|
|
"""
|
|
# First step: clear cache to gain memory
|
|
clearCaches()
|
|
|
|
# Get total program size
|
|
max_rss = getMemorySize()
|
|
if max_rss is not None:
|
|
# Get old limit and then set our new memory limit
|
|
old_limit = getMemoryLimit()
|
|
limit = max_rss + limit
|
|
limited = setMemoryLimit(limit)
|
|
else:
|
|
limited = False
|
|
|
|
try:
|
|
# Call function
|
|
return func(*args, **kw)
|
|
finally:
|
|
# and unset our memory limit
|
|
if limited:
|
|
setMemoryLimit(old_limit)
|
|
|
|
# After calling the function: clear all caches
|
|
clearCaches()
|