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ptr-c.c
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ptr-c.c
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//#//include <malloc.h>
// Must be defined in this file???
#define _XOPEN_SOURCE 500
#include <caml/mlvalues.h>
#include <caml/alloc.h>
#include <caml/fail.h>
#include <caml/memory.h>
#include <caml/custom.h>
#include <caml/unixsupport.h>
#include "ptr.h"
//#pragma message ( "BLOCKING SECTION OVERRIDDEN ptr-c.c" )
//#define enter_blocking_section()
//#define leave_blocking_section()
#ifdef _WIN32
#define HAS_BYTESWAP 1
#endif
/*
* This is a new style for ptrs: the custom ptr points to a ptr_struct struct
*/
/*
* Windows seems to like aligning to 16 byte values
* (Modern Linuxes should be at least 8 since malloc() says the alignment is suitable for any variable)
* This function will ignore alignment if the value is 1, 2, 4, 8, or 16.
* It does not check the malloc for NULL, so the output of this function must be checked by the caller!
* If the malloc alignment does not match then it returns NULL
*/
void *attempt_aligned_alloc(intnat length, intnat align) {
void *ret;
intnat align_minus_1 = align - 1;
if(
((align | 0x1F) == 0x1F) && /* Makes sure the value is somewhere between 0 and 31 */
((align & align_minus_1) == 0) /* Silly way of checking for a power of 2 */
) {
// We can try doing a regular malloc
// printf(" Mallocing %lld to %lld\n", length, align);
ret = malloc(length);
// printf(" Malloced to %016llX & %016llX = %016llX\n", (intnat)ret, align_minus_1, (intnat)ret & align_minus_1);
if(((intnat)ret & align_minus_1) == 0) {
// Success: all the lower bits are 0
// printf("S");
return ret;
} else {
// Try again
// printf("f");
free(ret);
return NULL;
}
} else {
// Can't use this
// printf(" align not valid (%d) (%d)\n", align | 0x3F, align & align_minus_1);
return NULL;
}
}
CAMLprim value ptr_make(value length_val, value align_val) {
CAMLparam2(length_val, align_val);
char *begin;
char *alloc_begin;
struct ptr_struct *p;
intnat length = Long_val(length_val);
intnat align = (Long_val(align_val) > 0 ? Long_val(align_val) : 1);
CAMLlocal1(cust);
// printf("Attempt...\n");
alloc_begin = (char *)attempt_aligned_alloc(length, align);
if(alloc_begin == NULL) {
// Aligned alloc failed for some reason; do a regular padded alloc
alloc_begin = (char *)malloc(length + align - 1);
if(alloc_begin == NULL) raise_out_of_memory();
begin = (char *)((((size_t)alloc_begin + align - 1) / align) * align);
} else {
// Aligned alloc succeeded! The allocated range is exactly the returned range
// printf(" other alloc OK\n");
begin = alloc_begin;
}
cust = caml_alloc_custom(&generic_ptr_opts, sizeof(struct ptr_struct), length, 64 * 1024 * 1024);
// cust = caml_alloc_custom(&generic_ptr_opts, sizeof(struct ptr_struct), 1, 64);
p = Struct_val(cust);
// printf("Just MALLOC'd %lld bytes\n", length);
// fflush(stdout);
p->begin = begin;
p->alloc_begin = alloc_begin;
p->length = length;
p->align = align;
p->type = PTR_MALLOC;
// printf(" Ptr returning value %p,%p length %lld align %lld\n", p->alloc_begin, p->begin, p->length, p->align);
CAMLreturn(cust);
}
value ptr_get_page_size() {
#ifdef _WIN32
SYSTEM_INFO si;
GetSystemInfo(&si);
return(Val_long(si.dwPageSize));
#else
return(Val_long(getpagesize()));
#endif
}
/*
* This function does not check whether the length is a multiple of the page size.
* The first argument is NOT used to compute anything; it is only used for passing to the align field.
* It MUST be set to the system's memory page size
* The only reason it exists is that I don't know how to make a global value in C from a function
*/
CAMLprim value ptr_make_virtual_alloc(value page_size_val, value length_val) {
#if _WIN32
CAMLparam2(page_size_val, length_val);
char *begin;
struct ptr_struct *p;
intnat length = Long_val(length_val);
CAMLlocal1(cust);
begin = (char *)VirtualAlloc(NULL, length, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if(begin == NULL) raise_out_of_memory();
cust = caml_alloc_custom(&generic_ptr_opts, sizeof(struct ptr_struct), length, 64 * 1024 * 1024);
p = Struct_val(cust);
p->begin = begin;
p->alloc_begin = begin;
p->length = length;
p->align = Long_val(page_size_val);
p->type = PTR_VIRTUALALLOC;
CAMLreturn(cust);
#else
// Fake it in Linux
return(ptr_make(length_val, page_size_val));
#endif
}
CAMLprim value ptr_length(value ptr_val) {
return(Val_long(Length_val(ptr_val)));
}
CAMLprim value ptr_align(value ptr_val) {
return(Val_int(Align_val(ptr_val)));
}
/********/
/* BLIT */
/********/
CAMLprim void ptr_clear(value ptr_val) {
// CAMLparam1(ptr_val);
char *ptr = Begin_val(ptr_val);
intnat len = Length_val(ptr_val);
memset(ptr, '\0', len);
// CAMLreturn0;
}
CAMLprim void ptr_blit(value from_val, value from_off_val, value to_val, value to_off_val, value len_val) {
// CAMLparam5(from_val, from_off_val, to_val, to_off_val, len_val);
char *from = Begin_val(from_val) + Long_val(from_off_val);
char *to = Begin_val(to_val) + Long_val(to_off_val);
size_t l = Long_val(len_val);
// printf("BLITTING %lld bytes from %p to %p\n", l, from, to);
memmove(to, from, l);
// CAMLreturn0;
}
CAMLprim void ptr_blit_from_string(value str_val, value str_off_val, value ptr_val, value ptr_off_val, value len_val) {
// CAMLparam5(str_val, str_off_val, ptr_val, ptr_off_val, len_val);
char *s = String_val(str_val) + Long_val(str_off_val);
char *p = Begin_val(ptr_val) + Long_val(ptr_off_val);
size_t l = Long_val(len_val);
memmove(p, s, l);
// CAMLreturn0;
}
CAMLprim void ptr_blit_to_string(value ptr_val, value ptr_off_val, value str_val, value str_off_val, value len_val) {
// CAMLparam5(ptr_val, ptr_off_val, str_val, str_off_val, len_val);
char *p = Begin_val(ptr_val) + Long_val(ptr_off_val);
char *s = String_val(str_val) + Long_val(str_off_val);
size_t l = Long_val(len_val);
// printf("Moving %d from %p to %p\n", l, p, s);
memmove(s, p, l);
// CAMLreturn0;
}
/**************/
/* SMALL COPY */
/**************/
/* PUT */
CAMLprim void ptr_put_8_of_int(value ptr_val, value offset_val, value put_val) {
// CAMLparam3(ptr_val, offset_val, put_val);
char *loc = Begin_val(ptr_val) + Long_val(offset_val);
*loc = Int_val(put_val);
// CAMLreturn0;
}
CAMLprim void ptr_put_16_of_int(value ptr_val, value offset_val, value put_val) {
// CAMLparam3(ptr_val, offset_val, put_val);
int16_t *loc = (int16_t *)(Begin_val(ptr_val) + Long_val(offset_val));
*loc = Int_val(put_val);
// CAMLreturn0;
}
CAMLprim void ptr_put_32_of_int(value ptr_val, value offset_val, value put_val) {
// CAMLparam3(ptr_val, offset_val, put_val);
int32 *loc = (int32 *)(Begin_val(ptr_val) + Long_val(offset_val));
*loc = Int_val(put_val);
// CAMLreturn0;
}
CAMLprim void ptr_put_64_of_int(value ptr_val, value offset_val, value put_val) {
// CAMLparam3(ptr_val, offset_val, put_val);
int64 *loc = (int64 *)(Begin_val(ptr_val) + Long_val(offset_val));
*loc = Long_val(put_val);
// CAMLreturn0;
}
CAMLprim void ptr_put_64_of_int64(value ptr_val, value offset_val, value put_val) {
// CAMLparam3(ptr_val, offset_val, put_val);
int64 *loc = (int64 *)(Begin_val(ptr_val) + Long_val(offset_val));
*loc = Int64_val(put_val);
// CAMLreturn0;
}
CAMLprim void ptr_put_32_of_float(value ptr_val, value offset_val, value put_val) {
// CAMLparam3(ptr_val, offset_val, put_val);
float *loc = (float *)(Begin_val(ptr_val) + Long_val(offset_val));
*loc = Double_val(put_val);
// CAMLreturn0;
}
CAMLprim void ptr_put_64_of_float(value ptr_val, value offset_val, value put_val) {
// CAMLparam3(ptr_val, offset_val, put_val);
double *loc = (double *)(Begin_val(ptr_val) + Long_val(offset_val));
*loc = Double_val(put_val);
// CAMLreturn0;
}
/* GET */
CAMLprim value ptr_get_int_of_8(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
char *loc = Begin_val(ptr_val) + Long_val(offset_val);
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int_of_8u(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
unsigned char *loc = (unsigned char *)(Begin_val(ptr_val) + Long_val(offset_val));
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int_of_16(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
int16_t *loc = (int16_t *)(Begin_val(ptr_val) + Long_val(offset_val));
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int_of_16u(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
uint16_t *loc = (uint16_t *)(Begin_val(ptr_val) + Long_val(offset_val));
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int_of_32(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
int32 *loc = (int32 *)(Begin_val(ptr_val) + Long_val(offset_val));
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int_of_32u(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
uint32 *loc = (uint32 *)(Begin_val(ptr_val) + Long_val(offset_val));
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int_of_64(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
int64 *loc = (int64 *)(Begin_val(ptr_val) + Long_val(offset_val));
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int_of_64u(value ptr_val, value offset_val) {
// CAMLparam2(ptr_val, offset_val);
uint64 *loc = (uint64 *)(Begin_val(ptr_val) + Long_val(offset_val));
// CAMLreturn(Val_int(*loc));
return(Val_int(*loc));
}
CAMLprim value ptr_get_int64_of_64(value ptr_val, value offset_val) {
CAMLparam2(ptr_val, offset_val);
int64 *loc = (int64 *)(Begin_val(ptr_val) + Long_val(offset_val));
CAMLlocal1(out_val);
out_val = caml_copy_int64(*loc);
CAMLreturn(out_val);
}
CAMLprim value ptr_get_float_of_32(value ptr_val, value offset_val) {
CAMLparam2(ptr_val, offset_val);
float *loc = (float *)(Begin_val(ptr_val) + Long_val(offset_val));
CAMLlocal1(out_val);
out_val = caml_copy_double(*loc);
CAMLreturn(out_val);
}
CAMLprim value ptr_get_float_of_64(value ptr_val, value offset_val) {
CAMLparam2(ptr_val, offset_val);
double *loc = (double *)(Begin_val(ptr_val) + Long_val(offset_val));
CAMLlocal1(out_val);
out_val = caml_copy_double(*loc);
CAMLreturn(out_val);
}
// Byte swap functions
// Apparently CAMLparamX is only needed if a heap allocation takes place before a heap access
CAMLprim void ptr_put_16_of_int_bswap(value ptr_val, value offset_val, value put_val) {
uint16_t *loc = (uint16_t *)(Begin_val(ptr_val) + Long_val(offset_val));
uint16_t put = Int_val(put_val);
// It looks like _byteswap_ushort just maps to a 16-bit rotate, so use a more portable version
// It should map the exact same way
put = (((put & 0x00FF) << 8) | ((put & 0xFF00) >> 8));
*loc = put;
}
CAMLprim void ptr_put_32_of_int_bswap(value ptr_val, value offset_val, value put_val) {
uint32 *loc = (uint32 *)(Begin_val(ptr_val) + Long_val(offset_val));
uint32 put = Int_val(put_val);
#if HAS_BYTESWAP
put = _byteswap_ulong(put);
#else
put = (((put & 0x0000FFFF) << 16) | ((put & 0xFFFF0000) >> 16));
put = (((put & 0x00FF00FF) << 8) | ((put & 0xFF00FF00) >> 8));
#endif
*loc = put;
}
// bswap only works on ints, so we have to go double -> float -> int
CAMLprim void ptr_put_32_of_float_bswap(value ptr_val, value offset_val, value put_val) {
uint32 *loc = (uint32 *)(Begin_val(ptr_val) + Long_val(offset_val));
float put_float = Double_val(put_val);
uint32 put = *((uint32 *)(&put_float));
#if HAS_BYTESWAP
put = _byteswap_ulong(put);
#else
put = (((put & 0x0000FFFF) << 16) | ((put & 0xFFFF0000) >> 16));
put = (((put & 0x00FF00FF) << 8) | ((put & 0xFF00FF00) >> 8));
#endif
*loc = put;
}
CAMLprim value ptr_get_int_of_32u_bswap(value ptr_val, value offset_val) {
uint32 *loc = (uint32 *)(Begin_val(ptr_val) + Long_val(offset_val));
uint32 got = loc[0];
#if HAS_BYTESWAP
got = _byteswap_ulong(got);
#else
// GCC has __builtin_bswap32, but the assembly doesn't look too much better
got = (((got & 0x0000FFFF) << 16) | ((got & 0xFFFF0000) >> 16));
got = (((got & 0x00FF00FF) << 8) | ((got & 0xFF00FF00) >> 8));
#endif
return(Val_int(got));
}
/********/
/* MMAP */
/********/
// This is VERY different between Windows and Linux
#ifdef _WIN32
DWORD map_access_array[] = {PAGE_WRITECOPY, PAGE_READONLY, PAGE_READWRITE};
DWORD view_access_array[] = {FILE_MAP_COPY, FILE_MAP_READ, FILE_MAP_WRITE};
#else
int map_protect_array[] = {PROT_READ | PROT_WRITE, PROT_READ, PROT_READ | PROT_WRITE};
int map_flag_array[] = {MAP_PRIVATE, MAP_PRIVATE, MAP_SHARED};
#endif
CAMLprim value ptr_map_handle(value h_val, value from_val, value len_val, value access_val) {
CAMLparam4(h_val, from_val, len_val, access_val);
#ifdef _WIN32
HANDLE h;
HANDLE h_map;
ULARGE_INTEGER from_large;
LARGE_INTEGER len_large;
DWORD map_access = map_access_array[Int_val(access_val)];
DWORD view_access = view_access_array[Int_val(access_val)];
CAMLlocal1(cust);
from_large.QuadPart = Long_val(from_val);
len_large.QuadPart = Long_val(len_val);
h = Handle_val(h_val);
if(len_large.QuadPart == 0) {
if(!GetFileSizeEx(h, &len_large)) {
len_large.QuadPart = 0;
}
}
if(len_large.QuadPart == 0) {
struct ptr_struct *p;
cust = caml_alloc_custom(&generic_ptr_opts, sizeof(struct ptr_struct), 0, 64*1024*1024);
p = Struct_val(cust);
p->begin = NULL;
p->alloc_begin = NULL;
p->length = 0;
p->align = 0;
p->type = PTR_NULL;
} else {
h_map = CreateFileMapping(
h,
NULL,
map_access,
len_large.HighPart,
len_large.LowPart,
NULL
);
if(h_map == NULL) {
// printf("NULL! %d\n", GetLastError());
caml_failwith("CreateFileMapping failed");
} else {
char *map_ptr;
map_ptr = (char *)MapViewOfFile(
h_map,
view_access,
from_large.HighPart,
from_large.LowPart,
len_large.QuadPart
);
if(map_ptr == NULL) {
// printf("2NULL! %d\n", GetLastError());
caml_failwith("MapViewOfFile failed");
} else {
SYSTEM_INFO sysinfo;
MEMORY_BASIC_INFORMATION info;
SIZE_T ret;
GetSystemInfo(&sysinfo);
CloseHandle(h_map);
ret = VirtualQuery(
map_ptr,
&info,
sizeof(MEMORY_BASIC_INFORMATION)
);
if(ret == 0) {
// printf("3NULL! %d\n", GetLastError());
caml_failwith("VirtualQuery failed");
} else {
// Now make the ptr
struct ptr_struct *p;
// int i;
cust = caml_alloc_custom(&generic_ptr_opts, sizeof(struct ptr_struct), info.RegionSize, 64*1024*1024);
p = Struct_val(cust);
p->begin = map_ptr;
p->alloc_begin = map_ptr;
p->length = info.RegionSize;
p->align = sysinfo.dwPageSize;
p->type = PTR_MMAP;
}
}
}
}
CAMLreturn(cust);
#else // _WIN32 for mmap
// CAMLparam4(h_val, from_val, len_val, access_val);
int h = Int_val(h_val);
off_t from = Long_val(from_val);
size_t len = Long_val(len_val);
int prot = map_protect_array[Int_val(access_val)];
int flags = map_flag_array[Int_val(access_val)];
char *map_ptr;
CAMLlocal1(cust);
if(len == 0) {
// Windows will map the whole file in this case, which is kind of useful
off_t start = lseek(h, 0, SEEK_CUR);
len = (size_t)lseek(h, 0, SEEK_END) - start;
lseek(h, start, SEEK_SET);
}
if(len == 0) {
struct ptr_struct *p;
cust = caml_alloc_custom(&generic_ptr_opts, sizeof(struct ptr_struct), 0, 64*1024*1024);
p = Struct_val(cust);
p->begin = NULL;
p->alloc_begin = NULL;
p->length = 0;
p->align = 0;
p->type = PTR_NULL;
} else {
map_ptr = (char *)mmap(NULL, len, prot, flags, h, from);
if(map_ptr == (char *)MAP_FAILED) {
// printf("Got prot %d, flags %d (wanted %d and %d)\n", prot, flags, PROT_READ, MAP_PRIVATE);
caml_failwith("MMAP failed");
} else {
struct ptr_struct *p;
cust = caml_alloc_custom(&generic_ptr_opts, sizeof(struct ptr_struct), len, 64*1024*1024);
p = Struct_val(cust);
p->begin = map_ptr;
p->alloc_begin = map_ptr;
p->length = len;
p->align = getpagesize();
p->type = PTR_MMAP;
}
}
CAMLreturn(cust);
#endif // _WIN32 for mmap
}
CAMLprim value ptr_flush_map(value ptr_val) {
CAMLparam1(ptr_val);
if(Type_val(ptr_val) == PTR_MMAP) {
#ifdef _WIN32
CAMLreturn(Val_bool(FlushViewOfFile(
Alloc_begin_val(ptr_val),
Length_val(ptr_val)
)));
#else
CAMLreturn(Val_bool(msync(Alloc_begin_val(ptr_val), Length_val(ptr_val), MS_SYNC)));
#endif
} else {
CAMLreturn(Val_bool(FALSE));
}
}
CAMLprim void ptr_unmap(value ptr_val) {
CAMLparam1(ptr_val);
if(Type_val(ptr_val) == PTR_MMAP) {
#ifdef _WIN32
UnmapViewOfFile(Alloc_begin_val(ptr_val));
#else
munmap(Alloc_begin_val(ptr_val), Length_val(ptr_val));
#endif
// Now invalidate the ptr
Begin_val(ptr_val) = NULL;
Alloc_begin_val(ptr_val) = NULL;
Length_val(ptr_val) = 0;
Type_val(ptr_val) = PTR_NULL;
}
CAMLreturn0;
}
/*
CAMLprim value ptr_create_shared_memory(value name_val) {
CAMLparam1(name_val);
CAMLlocal1(h_val);
#ifdef _WIN32
;
#else
#endif
CAMLreturn(h_val);
}
*/
/************************/
/* UNIXY FILE FUNCTIONS */
/************************/
#ifdef _WIN32
CAMLprim value ptr_read(value fd, value ptr, value ofs, value len, value really_val, value pos_or_negative_val) {
CAMLparam5(fd, ptr, ofs, len, really_val);
CAMLxparam1(pos_or_negative_val);
DWORD num_bytes;
DWORD passed_num_bytes;
DWORD num_read;
DWORD total_bytes = 0;
DWORD err = 0;
int really = Int_val(really_val);
char *c = Begin_val(ptr) + Long_val(ofs);
/* overlapping stuff */
intnat pos_passed = Long_val(pos_or_negative_val);
OVERLAPPED o;
LPOVERLAPPED o_star;
if(pos_passed < 0) {
o_star = NULL;
} else {
o.Internal = 0;
o.InternalHigh = 0;
o.Offset = pos_passed;
#ifdef ARCH_SIXTYFOUR
o.OffsetHigh = (pos_passed >> 32);
#else
o.OffsetHigh = 0;
#endif
o.hEvent = NULL;
o_star = &o;
// printf("POINTER IS %p\n", o.Pointer);
// printf("Offest is %08X:%08X\n", o.OffsetHigh, o.Offset);
}
num_bytes = passed_num_bytes = Long_val(len);
if(Descr_kind_val(fd) == KIND_SOCKET) {
int ret;
SOCKET s = Socket_val(fd);
enter_blocking_section();
do {
ret = recv(s, c, num_bytes, 0);
if(ret == SOCKET_ERROR) {
err = WSAGetLastError();
break;
}
total_bytes += ret; c += ret;
num_bytes -= ret;
// Messy, but whatever
if(really && ret == 0 && num_bytes != 0) {
err = ERROR_HANDLE_EOF;
break;
}
} while(really && num_bytes > 0);
leave_blocking_section();
num_read = ret;
} else {
HANDLE h = Handle_val(fd);
enter_blocking_section();
do {
if(!ReadFile(h, c, num_bytes, &num_read, o_star)) {
err = GetLastError();
break;
}
total_bytes += num_read; c += num_read;
num_bytes -= num_read;
// OOPS! I forgot to update the overlapped structure here!
if(o_star != NULL) {
o_star->Offset += num_read;
}
} while(really && num_bytes > 0);
leave_blocking_section();
}
if(err) {
win32_maperr(err);
uerror("Ptr.read", Nothing);
}
CAMLreturn(Val_int(total_bytes));
}
#else
CAMLprim value ptr_read(value fd, value ptr, value ofs, value len, value really_val, value pos_or_negative_val) {
CAMLparam5(fd, ptr, ofs, len, really_val);
CAMLxparam1(pos_or_negative_val);
int h = Int_val(fd);
size_t num_bytes = Long_val(len);
ssize_t num_read;
size_t total_bytes = 0;
int err = 0;
int really = Int_val(really_val);
off_t pos_passed = Long_val(pos_or_negative_val);
char *c = Begin_val(ptr) + Long_val(ofs);
if(pos_passed < 0) {
// Read normally
enter_blocking_section();
do {
num_read = read(h, c, num_bytes);
if(num_read <= 0) {
err = errno;
break;
}
total_bytes += num_read; c += num_read;
} while(really && total_bytes < num_bytes);
leave_blocking_section();
} else {
// Use pread to read from a specific point
enter_blocking_section();
do {
num_read = pread(h, c, num_bytes, pos_passed);
if(num_read <= 0) {
err = errno;
break;
}
total_bytes += num_read; c += num_read; pos_passed += num_read;
} while(really && total_bytes < num_bytes);
leave_blocking_section();
}
// Uhhh... I assume uerror uses errno
// unix_error seems to be the same, but you can specify your own errno
if(err) {
unix_error(err, "Ptr.read", Nothing);
}
CAMLreturn(Val_int(total_bytes));
}
#endif
CAMLprim value ptr_read_bytecode(value *argv, int argn) {
return ptr_read(argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
}
#ifdef _WIN32
CAMLprim value ptr_write(value fd, value ptr, value ofs, value len, value really_val, value pos_or_negative_val) {
CAMLparam5(fd, ptr, ofs, len, really_val);
CAMLxparam1(pos_or_negative_val);
DWORD passed_num_bytes;
DWORD num_bytes;
DWORD num_wrote;
DWORD total_bytes = 0;
DWORD err = 0;
int really = Int_val(really_val);
char *c = Begin_val(ptr) + Long_val(ofs);
/* Overlap */
intnat pos_passed = Long_val(pos_or_negative_val);
OVERLAPPED o;
LPOVERLAPPED o_star;
if(pos_passed < 0) {
o_star = NULL;
} else {
o.Internal = 0;
o.InternalHigh = 0;
o.Offset = pos_passed;
#ifdef ARCH_SIXTYFOUR
o.OffsetHigh = (pos_passed >> 32);
#else
o.OffsetHigh = 0;
#endif
o.hEvent = NULL;
o_star = &o;
}
num_bytes = passed_num_bytes = Long_val(len);
if(Descr_kind_val(fd) == KIND_SOCKET) {
int ret;
SOCKET s = Socket_val(fd);
enter_blocking_section();
do {
ret = send(s, c, num_bytes, 0);
if(ret == SOCKET_ERROR) {
err = WSAGetLastError();
break;
}
// XXX XXX XXX I FORGOT THIS LINE IN OTHER VERSIONS!!! XXX XXX XXX
total_bytes += ret; c += ret;
num_bytes -= ret;
if(really && ret == 0 && total_bytes != num_bytes) {
// Wrote nothing
err = ERROR_HANDLE_EOF;
break;
}
} while(really && num_bytes > 0);
leave_blocking_section();
num_wrote = ret;
} else {
HANDLE h = Handle_val(fd);
enter_blocking_section();
do {
if(!WriteFile(h, c, num_bytes, &num_wrote, o_star)) {
err = GetLastError();
break;
}
total_bytes += num_wrote; c += num_wrote;
num_bytes -= num_wrote;
} while(really && num_bytes > 0);
leave_blocking_section();
}
if(err) {
win32_maperr(err);
// printf("FAILED WITH WINDOWS ERROR %d\n", err);
uerror("Ptr.write", Nothing);
}
CAMLreturn(Val_int(total_bytes));
}
#else
CAMLprim value ptr_write(value fd, value ptr, value ofs, value len, value really_val, value pos_or_negative_val) {
CAMLparam5(fd, ptr, ofs, len, really_val);
CAMLxparam1(pos_or_negative_val);
int h = Int_val(fd);
size_t num_bytes = Long_val(len);
ssize_t num_write;
size_t total_bytes = 0;
int err = 0;
int really = Int_val(really_val);
off_t pos_passed = Long_val(pos_or_negative_val);
char *c = Begin_val(ptr) + Long_val(ofs);
if(pos_passed < 0) {
// Write normally
enter_blocking_section();
do {
num_write = write(h, c, num_bytes);
if(num_write <= 0) {
err = errno;
break;
}
total_bytes += num_write; c += num_write;
} while(really && total_bytes < num_bytes);
leave_blocking_section();
} else {
// Use pwrite
enter_blocking_section();
do {
num_write = pwrite(h, c, num_bytes, pos_passed);
if(num_write <= 0) {
err = errno;
break;
}
total_bytes += num_write; c += num_write; pos_passed += num_write;
} while(really && total_bytes < num_bytes);
leave_blocking_section();
}
if(err) {
unix_error(err, "Ptr.write", Nothing);
}
CAMLreturn(Val_int(total_bytes));
}
#endif
CAMLprim value ptr_write_bytecode(value *argv, int argn) {
return ptr_write(argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
}
#if 0
CAMLprim value make_ptr_caml(value size_val, value align_val) {
CAMLparam2(size_val, align_val);
char *actual_pointer;
char *returned_pointer;
intnat align = (Int_val(align_val) > 0 ? Int_val(align_val) : 1);
intnat alloc_size = Long_val(size_val) + sizeof(/*__int32*/size_t) + align - 1;
CAMLlocal2(cust,tuple);
actual_pointer = (char *)malloc(alloc_size);
if(actual_pointer == NULL) raise_out_of_memory();
returned_pointer = (char *)((((size_t)actual_pointer + sizeof(/*__int32*/size_t) + align - 1) / align) * align);
((char **)returned_pointer)[-1] = actual_pointer;
cust = caml_alloc_custom(&generic_ptr_opts, sizeof(char *), Int_val(size_val), 64*1024*1024);
ptr_custom(cust) = returned_pointer;
tuple = caml_alloc_tuple(2);
Store_field(tuple,0,size_val);
Store_field(tuple,1,cust);
CAMLreturn(tuple);
}
CAMLprim value length_ptr_caml(value ptr_val) {
CAMLparam1(ptr_val);
CAMLreturn(ptr_size(ptr_val));
}
CAMLprim value aligned_to_mask_caml(value mask_val, value ptr_val) {
CAMLparam2(mask_val, ptr_val);
char *caml_pointer = ptr_value(ptr_val);
printf("%016X & %016X %d\n", (size_t)caml_pointer, Long_val(mask_val), ((size_t)caml_pointer & Long_val(mask_val)) == 0);
CAMLreturn(Val_bool(((size_t)caml_pointer & Long_val(mask_val)) == 0));
}
void ptr_of_string_caml(value str, value ptr) {
CAMLparam2(str, ptr);
char *p = ptr_value(ptr);
char *s = String_val(str);
size_t l = Long_val(ptr_size(ptr));
// printf("%p -> %p (%d)\n", s, p, l);
// fflush(stdout);
memmove(p, s, l);
CAMLreturn0;
}
void string_of_ptr_caml(value ptr, value str) {
CAMLparam2(ptr, str);
memmove(String_val(str), ptr_value(ptr), string_length(str));
CAMLreturn0;
}
CAMLprim value ptr_compare_caml(value v1, value v2) {
CAMLparam2(v1, v2);
long l1 = Long_val(ptr_size(v1));
long l2 = Long_val(ptr_size(v2));
unsigned char *c1 = ptr_value(v1);
unsigned char *c2 = ptr_value(v2);
int i;
int ret = 0;
enter_blocking_section();
if(l1 < l2) {
ret = -1;
} else if(l1 > l2) {
ret = 1;
} else {
// Same length
for(i = 0; i < l1; i++) {
if(*c1 < *c2) {
ret = -1;
break;
} else if(*c1 > *c2) {
ret = 1;
break;
} else {
c1++;
c2++;
}
}
}
leave_blocking_section();
CAMLreturn(Val_int(ret));
}
CAMLprim value ptr_compare_sub_caml(value v1, value v1_off, value v2, value v2_off, value len_val) {
CAMLparam5(v1, v1_off, v2, v2_off, len_val);
long len = Long_val(len_val);
unsigned char *c1 = ptr_value(v1) + Long_val(v1_off);
unsigned char *c2 = ptr_value(v2) + Long_val(v2_off);
int i;
int ret = 0;
enter_blocking_section();
for(i = 0; i < len; i++) {
if(*c1 < *c2) {
ret = -1;
break;
} else if(*c1 > *c2) {
ret = 1;
break;
} else {
c1++;
c2++;
}
}
leave_blocking_section();
CAMLreturn(Val_int(ret));
}
CAMLprim void blit_caml(value src_val, value src_off_val, value dest_val, value dest_off_val, value len_val) {
CAMLparam5(src_val, src_off_val, dest_val, dest_off_val, len_val);
memmove(ptr_value(dest_val) + Int_val(dest_off_val), ptr_value(src_val) + Int_val(src_off_val), Int_val(len_val));
CAMLreturn0;
}
CAMLprim void blit_from_string_caml(value str_val, value str_off_val, value ptr_val, value ptr_off_val, value len_val) {
CAMLparam5(str_val, str_off_val, ptr_val, ptr_off_val, len_val);
memmove(ptr_value(ptr_val) + Int_val(ptr_off_val), String_val(str_val) + Int_val(str_off_val), Int_val(len_val));
CAMLreturn0;
}
CAMLprim void blit_to_string_caml(value ptr_val, value ptr_off_val, value str_val, value str_off_val, value len_val) {
CAMLparam5(str_val, str_off_val, ptr_val, ptr_off_val, len_val);
memmove(String_val(str_val) + Int_val(str_off_val), ptr_value(ptr_val) + Int_val(ptr_off_val), Int_val(len_val));
CAMLreturn0;
}
/**************/
/* SMALL COPY */
/**************/
CAMLprim void put_int_to_32_caml(value ptr_val, value offset_val, value put_val) {
CAMLparam3(ptr_val, offset_val, put_val);
int32 *loc = (int32 *)(ptr_value(ptr_val) + Int_val(offset_val));
*loc = Int_val(put_val);
CAMLreturn0;
}
CAMLprim void put_int_to_64_caml(value ptr_val, value offset_val, value put_val) {
CAMLparam3(ptr_val, offset_val, put_val);
int64 *loc = (int64 *)(ptr_value(ptr_val) + Int_val(offset_val));
*loc = Long_val(put_val);
CAMLreturn0;
}
CAMLprim value get_32_to_int_caml(value ptr_val, value offset_val) {
CAMLparam2(ptr_val, offset_val);
int32 *loc = (int32 *)(ptr_value(ptr_val) + Int_val(offset_val));
CAMLreturn(Val_int(*loc));
}
CAMLprim value get_64_to_int_caml(value ptr_val, value offset_val) {
CAMLparam2(ptr_val, offset_val);
int64 *loc = (int64 *)(ptr_value(ptr_val) + Int_val(offset_val));
CAMLreturn(Val_int(*loc));
}
CAMLprim void put_int64_caml(value ptr_val, value offset_val, value int64_val) {
CAMLparam3(ptr_val, offset_val, int64_val);
int64 *loc = (int64 *)(ptr_value(ptr_val) + Int_val(offset_val));
*loc = Int64_val(int64_val);
CAMLreturn0;
}
CAMLprim value get_int64_caml(value ptr_val, value offset_val) {
CAMLparam2(ptr_val, offset_val);
int64 *loc;
CAMLlocal1(out_val);
loc = (int64 *)(ptr_value(ptr_val) + Int_val(offset_val));
out_val = caml_copy_int64(*loc);
CAMLreturn(out_val);