📄 csdn技术中心 cuj：标准库：allocator能做什么？.mht
字号:
style=3D"mso-spacerun: yes"> </SPAN>void =
deallocate(pointer p,=20
size_type) {</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =20
</SPAN>std::free(p);</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>}</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>size_type =
max_size() const {=20
</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>return =
static_cast<size_type>(-1) /=20
sizeof(value_type);</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>}</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>...</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>};</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
=
</SPAN>allocate()=BA=CDdeallocate()=B3=C9=D4=B1=BA=AF=CA=FD=B4=A6=C0=ED=B5=
=C4=CA=C7=CE=B4=B3=F5=CA=BC=BB=AF=B5=C4=C4=DA=B4=E6=A3=AC=CB=FC=C3=C7=B2=BB=
=B9=B9=D4=EC=BA=CD=CF=FA=BB=D9=B6=D4=CF=F3=A1=A3=D3=EF=BE=E4a.allocate(1)=
=B8=FC=CF=F3malloc(sizeof(int))=B6=F8=B2=BB=CA=C7new=20
=
int=A1=A3=D4=DA=CA=B9=D3=C3=B4=D3allocate()=BB=F1=B5=C3=B5=C4=C4=DA=B4=E6=
=C7=B0=A3=AC=C4=E3=B1=D8=D0=EB=D4=DA=D5=E2=BF=E9=C4=DA=B4=E6=C9=CF=B4=B4=BD=
=A8=B6=D4=CF=F3=A3=BB=D4=DA=CD=A8=B9=FDdeallocate()=B9=E9=BB=B9=C4=DA=B4=E6=
=C7=B0=A3=AC=C4=E3=D0=E8=D2=AA=CF=FA=BB=D9=C4=C7=D0=A9=B6=D4=CF=F3=A1=A3<=
/FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
=
</SPAN>C++=D3=EF=D1=D4=CC=E1=B9=A9=D2=BB=B8=F6=BB=FA=D6=C6=D2=D4=D4=DA=CC=
=D8=B6=A8=B5=C4=C4=DA=B4=E6=CE=BB=D6=C3=B4=B4=BD=A8=B6=D4=CF=F3=A3=BAplac=
ement new=A1=A3=C8=E7=B9=FB=C4=E3=D0=B4=CF=C2new(p) T(a,=20
=
b)=A3=AC=C4=C7=C3=B4=C4=E3=D5=FD=D4=DA=B5=F7=D3=C3T=B5=C4=B9=B9=D4=EC=BA=AF=
=CA=FD=B2=FA=C9=FA=D2=BB=B8=F6=D0=C2=B5=C4=B6=D4=CF=F3=A3=AC=D2=BB=C8=E7=C4=
=E3=D0=B4=B5=C4new T(a, b)=BB=F2 T t(a, =
b)=A1=A3=C7=F8=B1=F0=CA=C7=B5=B1=C4=E3=D0=B4new(p)=20
T(a,=20
=
b)=A3=AC=C4=E3=D6=B8=B6=A8=C1=CB=B6=D4=CF=F3=B1=BB=B4=B4=BD=A8=B5=C4=CE=BB=
=D6=C3=A3=BAp=CB=F9=D6=B8=CF=F2=B5=C4=B5=D8=D6=B7=A1=A3(=D7=D4=C8=BB=A3=AC=
p=B1=D8=D0=EB=D6=B8=CF=F2=D2=BB=BF=E9=D7=E3=B9=BB=B4=F3=B5=C4=C4=DA=B4=E6=
=A3=AC=B6=F8=C7=D2=B1=D8=D0=EB=CA=C7=CE=B4=B1=BB=CA=B9=D3=C3=B5=C4=C4=DA=B4=
=E6=A3=BB=C4=E3=B2=BB=C4=DC=D4=DA=CF=E0=CD=AC=B5=C4=B5=D8=D6=B7=B9=B9=BD=A8=
=C1=BD=B8=F6=B2=BB=CD=AC=B5=C4=B6=D4=CF=F3=A1=A3)=A1=A3=C4=E3=D2=B2=BF=C9=
=D2=D4=B5=F7=D3=C3=B6=D4=CF=F3=B5=C4=CE=F6=B9=B9=BA=AF=CA=FD=A3=AC=B6=F8=B2=
=BB=CA=CD=B7=C5=C4=DA=B4=E6=A3=AC=D6=BB=D2=AA=D0=B4p->~T()=A1=A3</FONT=
></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
=
</SPAN>=D5=E2=D0=A9=CC=D8=D0=D4=BA=DC=C9=D9=B1=BB=CA=B9=D3=C3=A3=AC=D2=F2=
=CE=AA=CD=A8=B3=A3=C4=DA=B4=E6=B5=C4=B7=D6=C5=E4=BA=CD=B3=F5=CA=BC=BB=AF=CA=
=C7=D2=BB=C6=F0=BD=F8=D0=D0=B5=C4=A3=BA=CA=B9=D3=C3=CE=B4=B3=F5=CA=BC=BB=AF=
=B5=C4=C4=DA=B4=E6=CA=C7=B2=BB=B7=BD=B1=E3=B5=C4=BA=CD=CE=A3=CF=D5=B5=C4=A1=
=A3=C4=E3=D0=E8=D2=AA=C8=E7=B4=CB=B5=CD=B2=E3=B5=C4=BC=BC=C7=C9=B5=C4=BA=DC=
=C9=D9=BC=B8=B4=A6=D6=AE=D2=BB=BE=CD=CA=C7=C4=E3=D4=DA=D0=B4=D2=BB=B8=F6=C8=
=DD=C6=F7=C0=E0=A3=AC=D3=DA=CA=C7allocator=BD=AB=C4=DA=B4=E6=B5=C4=B7=D6=C5=
=E4=D3=EB=B3=F5=CA=BC=BB=AF=BD=E2=F1=EE=A1=A3=B3=C9=D4=B1=BA=AF=CA=FDcons=
truct()=B5=F7=D3=C3placement=20
=
new=A3=AC=B6=F8=C7=D2=B3=C9=D4=B1=BA=AF=CA=FDdestory()=B5=F7=D3=C3=CE=F6=B9=
=B9=BA=AF=CA=FD=A1=A3</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =
</SPAN>template=20
<class T> class =
malloc_allocator</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>{</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>public:</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>void =
construct(pointer p,=20
const value_type& x) { </FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>new(p) =
value_type(x); </FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>}</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>void =
destroy(pointer p) {=20
p->~value_type(); }</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>...</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>};</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
=
</SPAN>(=CE=AA=CA=B2=C3=B4allocator=D3=D0=C4=C7=D0=A9=B3=C9=D4=B1=BA=AF=CA=
=FD=A3=AC=CA=B2=C3=B4=CA=B1=BA=F2=C8=DD=C6=F7=BF=C9=D2=D4=D6=B1=BD=D3=CA=B9=
=D3=C3placement=20
=
new=A3=BF=D2=BB=B8=F6=C0=ED=D3=C9=CA=C7=D2=AA=D2=FE=B2=D8=B1=BF=D7=BE=B5=C4=
=D3=EF=B7=A8=A3=AC=B6=F8=C1=ED=D2=BB=B8=F6=CA=C7=C8=E7=B9=FB=D0=B4=D2=BB=B8=
=F6=B8=FC=B8=B4=D4=D3=B5=C4allocator=CA=B1=C4=E3=BF=C9=C4=DC=CF=EB=D4=DA=B9=
=B9=D4=EC=BA=CD=CF=FA=BB=D9=B6=D4=CF=F3=CA=B1construct()=BA=CDdestroy()=BB=
=B9=D3=D0=C6=E4=CB=FC=D2=BB=D0=A9=B8=B1=D7=F7=D3=C3=A1=A3=B1=C8=C8=E7=A3=AC=
allocator=BF=C9=C4=DC=CE=AC=BB=A4=D2=BB=B8=F6=CB=F9=D3=D0=B5=B1=C7=B0=BB=EE=
=B6=AF=B6=D4=CF=F3=B5=C4=C8=D5=D6=BE=A1=A3)</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
=
</SPAN>=D5=E2=D0=A9=B3=C9=D4=B1=BA=AF=CA=FD=C3=BB=D3=D0=D2=BB=B8=F6=CA=C7=
static=B5=C4=A3=AC=D2=F2=B4=CB=A3=AC=C8=DD=C6=F7=D4=DA=CA=B9=D3=C3allocat=
or=C7=B0=D7=F6=B5=C4=B5=DA=D2=BB=BC=FE=CA=C2=BE=CD=CA=C7=B4=B4=BD=A8=D2=BB=
=B8=F6allocator=B6=D4=CF=F3=A3=AD=A3=AD=D2=B2=BE=CD=CA=C7=CB=B5=CE=D2=C3=C7=
=D3=A6=B8=C3=B6=A8=D2=E5=D2=BB=D0=A9=B9=B9=D4=EC=BA=AF=CA=FD=A1=A3=B5=AB=CA=
=C7=A3=AC=CE=D2=C3=C7=B2=BB=D0=E8=D2=AA=B8=B3=D6=B5=D4=CB=CB=E3=A3=BA=D2=BB=
=B5=A9=C8=DD=C6=F7=B4=B4=BD=A8=C1=CB=CB=FC=B5=C4allocator=A3=AC=D5=E2=B8=F6=
allocator=BE=CD=B4=D3=C3=BB=CF=EB=B9=FD=BB=E1=B1=BB=B8=C4=B1=E4=A1=A3=B1=ED=
32=D6=D0=B5=C4=B6=D4allocator=B5=C4=D0=E8=C7=F3=C3=BB=D3=D0=B0=FC=C0=A8=B8=
=B3=D6=B5=A1=A3=D6=BB=CA=C7=BB=F9=D3=DA=B0=B2=C8=AB=A3=AC=CE=AA=C1=CB=C8=B7=
=B1=A3=C3=BB=C8=CB=C5=BC=C8=BB=CA=B9=D3=C3=C1=CB=B8=B3=D6=B5=D4=CB=CB=E3=A3=
=AC=CE=D2=C3=C7=BD=AB=BD=FB=D6=B9=B5=F4=D5=E2=B8=F6=BF=C9=C4=DC=D7=D4=B6=AF=
=C9=FA=B3=C9=B5=C4=BA=AF=CA=FD=A1=A3</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =
</SPAN>template=20
<class T> class =
malloc_allocator</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>{</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>public:</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>malloc_allocator() =
{}</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>malloc_allocator(const=20
malloc_allocator&) {}</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>~malloc_allocator()=20
{}</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>private:</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>void =
operator=3D(const=20
malloc_allocator&);</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN><SPAN=20
style=3D"mso-spacerun: yes"> =
</SPAN>...</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
</SPAN>};</FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =20
=
</SPAN>=D5=E2=D0=A9=B9=B9=D4=EC=BA=AF=CA=FD=CA=B5=BC=CA=C9=CF=C3=BB=D3=D0=
=D7=F6=C8=CE=BA=CE=CA=C2=A3=AC=D2=F2=CE=AA=D5=E2=B8=F6allocator=B2=BB=D0=E8=
=D2=AA=B3=F5=CA=BC=BB=AF=C8=CE=BA=CE=B3=C9=D4=B1=B1=E4=C1=BF=A1=A3=BB=F9=D3=
=DA=CD=AC=D1=F9=B5=C4=C0=ED=D3=C9=A3=AC=C8=CE=D2=E2=C1=BD=B8=F6malloc_all=
ocator=B6=BC=CA=C7=BF=C9=BB=A5=BB=BB=B5=C4=A3=BB=C8=E7=B9=FBa1=BA=CDa2=B5=
=C4=C0=E0=D0=CD=B6=BC=CA=C7malloc_allocator<int>=A3=AC=CE=D2=C3=C7=BF=
=C9=D2=D4=D7=D4=D3=C9=B5=D8=CD=A8=B9=FDa1=C0=B4allocate()=C4=DA=B4=E6=C8=BB=
=BA=F3=CD=A8=B9=FDa2=C0=B4deallocate()=CB=FC=A1=A3=CE=D2=C3=C7=D2=F2=B4=CB=
=B6=A8=D2=E5=D2=BB=B8=F6=B1=C8=BD=CF=B2=D9=D7=F7=D2=D4=B1=ED=C3=F7=CB=F9=D3=
=D0=B5=C4malloc_allocator=B6=D4=CF=F3=CA=C7=B5=C8=BC=DB=B5=C4=A3=BA</FONT=
></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> =
</SPAN>template=20
<class T></FONT></FONT></SPAN></P>
<P class=3DMsoPlainText style=3D"MARGIN: 0cm 0cm 0pt"><SPAN=20
lang=3DEN-US><FONT size=3D3><FONT face=3D=CB=CE=CC=E5><SPAN=20
style=3D"mso-tab-count: 1"> </SPAN>inline =
bool=20
operator=3D=3D(const malloc_allocator<T>&,=20
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