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C Copyright (c) 2003-2010 University of Florida
C
C This program is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Public License as published by
C the Free Software Foundation; either version 2 of the License, or
C (at your option) any later version.
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C The GNU General Public License is included in this distribution
C in the file COPYRIGHT.
subroutine mem_alloc(base, nwords, element_size, ixmem,
* heap, ierr)
c--------------------------------------------------------------------------
c Allocates "nwords*element_size" bytes of memory using MPI_ALLOC_MEM,
c and returns an index "ixmem" relative to the base address. Upon
c return, the memory may be referenced by Fortran code as base(ixmem+i-1),
c i = 1, 2, 3, ...,nwords.
c
c Arguments:
c base Base array to reference the returned index.
c nwords Number of words of memory to allocate.
c element_size Number of bytes per element.
c ixmem Returned index used in conjunction with "base" to
c reference the allocated memory. This argument
c should also be declared integer*8.
c heap Logical variable. heap = .true. requests heap
c allocation, .false. requests allocation on
c shared heap.
c ierr Return code. 0 = Successful allocation, otherwise
c the subroutine was unable to obtain the required
c amount of memory.
c
c--------------------------------------------------------------------------
implicit none
include 'machine_types.h'
include 'mem_alloc_data.h'
include 'parallel_info.h'
#ifdef ALTIX
include 'sheap.h'
#endif
integer base(*)
integer nwords, element_size, ierr
integer*8 ixmem
integer*8 addr1, addr2
integer*8 get_index_from_base
integer*8 size
integer type
integer sheap_flag
integer*8 ixx, c_loc64
logical heap
ierr = 0
if (nwords .lt. 0) then
print *,'Error: mem_alloc was called with nwords = ',nwords
call abort_job()
endif
if (element_size .eq. 8) then
c-------------------------------------------------------------------------
c Force alignment on a 8-byte boundary.
c-------------------------------------------------------------------------
if (memnxt/8*8 .ne. memnxt) then
memnxt = (memnxt+7)/8*8
endif
endif
size = nwords
size = size * element_size
c print *,'Task ',me,' MEM_ALLOC: nwords, element_size, size ',
c * nwords, element_size, size,' memnxt ',memnxt,
c * ' mem_malloced ',mem_malloced
if (memnxt + size .gt. mem_malloced) then
print *,'Memory exhausted.'
print *,'mem_malloced: ',mem_malloced,' memnxt ',memnxt,
* ' size requested ',element_size,'*',nwords
ierr = 1
return
endif
c print *,'Task ',me,' memix, intsize = ',memix,intsize
#ifdef ALTIX
addr1 = %loc(ishared_heap)
#else
addr1 = c_loc64(membase, memix, intsize)
#endif
addr2 = addr1 + memnxt
if (element_size .eq. 4) then
type = 1
else if (element_size .eq. 8) then
type = 2
else
print *,'MEM_ALLOC: invalid element size ',element_size
endif
c print *,'Task ',me,' ADDR1, ADDR2 ',ADDR1,ADDR2
#ifdef ALTIX
ixmem = get_index_from_base(addr2, ishared_heap, type)
#else
ixmem = get_index_from_base(addr2, base, type)
#endif
c print *,'Task ',me,' IXMEM RETURNED FROM MEM_ALLOC: ',
c * ixmem,' @base(ixmem) ',
#ifdef ALTIX
c * %loc(ishared_heap(ixmem)), %loc(dshared_heap(ixmem))
#else
c * c_loc64(base, ixmem, element_size)
#endif
memnxt = memnxt + size
c print *,'Task ',me,' New value of memnxt = ',memnxt
return
end
subroutine mem_alloc_init(mem_needed, sheap_flag, ierr)
c------------------------------------------------------------------
c Performs an actual malloc of the amount of memory needed. This
c will only be done one time in the life of an execution, even
c if we are called multiple times.
c------------------------------------------------------------------
implicit none
include 'mem_alloc_data.h'
include 'machine_types.h'
include 'parallel_info.h'
c include 'nothreads.h'
#ifdef ALTIX
include 'sheap.h'
#endif
integer mem_needed
integer nwords, ierr
integer*8 c_loc64
integer sheap_flag
integer*8 temp
logical first
save first
data first/.true./
ierr = 0
if (first) then
first = .false.
call init_machine_types() ! must be initialized.
temp = mem_needed * 1024
mem_malloced = temp * 1024
nwords = mem_malloced / intsize
#ifdef ALTIX
call fallocate_it(sheap_flag, nwords, ierr )
#else
c--------------------------------------------------------------------------
c "Normal" memory allocation via malloc.
c-------------------------------------------------------------------------
call malloc_wrapper(nwords, intsize, sheap_flag,
* membase, memix, ierr)
#endif
memnxt = 0
c print *,'MEM_ALLOC_INIT: mem_needed ',mem_needed,
c * ' mem_malloced ',mem_malloced
c print *,'Task ',me,' MEM BASE ADDR :',
#ifdef ALTIX
c * ishptr
#else
c * c_loc64(membase,memix,intsize)
#endif
c print *,'Task ',me,
c * ' memix at end of mem_alloc_init= ',memix
endif
return
end
subroutine mem_alloc_reset()
c-----------------------------------------------------------------------
c Resets the "next" pointer for the mem_alloc block.
c----------------------------------------------------------------------
implicit none
include 'mem_alloc_data.h'
memnxt = 0
return
end
subroutine mem_alloc_query(nbused)
c--------------------------------------------------------------------------
c Returns the total bytes used so far.
c--------------------------------------------------------------------------
implicit none
include 'mem_alloc_data.h'
integer*8 nbused
nbused = memnxt
return
end
integer*8 function get_mem_base_addr()
implicit none
c--------------------------------------------------------------------------
c Returns the address of the processor's heap memory.
c--------------------------------------------------------------------------
include 'mem_alloc_data.h'
include 'machine_types.h'
integer*8 c_loc64
#ifdef ALTIX
include 'sheap.h'
get_mem_base_addr = ishptr
#else
get_mem_base_addr = c_loc64(membase, memix, intsize)
#endif
return
end
subroutine mem_alloc_free(addr, ierr)
c--------------------------------------------------------------------------
c Reclaims all memory allocated beyond "addr" in mem_alloc_init.
c This memory can then be claimed again via mem_alloc.
c--------------------------------------------------------------------------
include 'mem_alloc_data.h'
include 'machine_types.h'
#ifdef ALTIX
include 'sheap.h'
#endif
integer*8 addr
integer ierr
integer*8 c_loc64, base
ierr = 0
#ifdef ALTIX
base = %loc(ishared_heap)
#else
base = c_loc64(membase, memix, intsize)
#endif
if (addr .lt. base) then
print *,'Error in mem_alloc_free: called with addr ',
* addr,' but the base address is ',base
ierr = 1
endif
memnxt = addr - base
return
end
integer*8 function get_max_heap_usage()
c--------------------------------------------------------------------------
c Returns the number of bytes malloced for heap memory.
c--------------------------------------------------------------------------
implicit none
include 'mem_alloc_data.h'
get_max_heap_usage = mem_malloced
return
end
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