Class: MPipe

Inherits:
Data
  • Object
show all
Defined in:
ext/mpipe/mpipe.c

Defined Under Namespace

Modules: Comm

Constant Summary collapse

VERSION = 
rb_str_new2(MPIPE_VERSION)
MPI_VERSION = 
INT2NUM(MPI_VERSION)
MPI_SUBVERSION = 
INT2NUM(MPI_SUBVERSION)
SUCCESS = 
INT2NUM(MPI_SUCCESS)
PROC_NULL = 
INT2NUM(MPI_PROC_NULL)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#new(string = ""[, mode]) ⇒ Object

Creates new MPipe instance from with string and mode.



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# File 'ext/mpipe/mpipe.c', line 227

static VALUE
mp_initialize(VALUE self, VALUE rank)
{
    struct MPipe *ptr = check_mpipe(self);

    if (!ptr) {
	DATA_PTR(self) = ptr = mp_alloc();
    }
    rb_call_super(0, 0);
    return mp_init(ptr, self, rank);
}

Class Method Details

.abort(rerror) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 83

static VALUE
mp_mpi_abort(VALUE klass, VALUE rerror)
{
    int ierror;

    ierror = MPI_Abort(MPI_COMM_WORLD, NUM2INT(rerror));
    return INT2NUM(ierror);
}

.buffer_size ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 92

static VALUE
mp_mpi_buffer_size(VALUE mod)
{
    return INT2NUM(mp_buffer_size);
}

.buffer_size=(size) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 98

static VALUE
mp_mpi_set_buffer_size(VALUE mod, VALUE size)
{
    if (mp_initialized) {
        rb_raise(rb_eStandardError,"buffer_size must be set before MPipe.init");
    }
    mp_buffer_size = NUM2INT(size);
    return size;
}

.finalize ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 76

static VALUE
mp_mpi_finalize(VALUE klass)
{
    mp_finalize();
    return Qnil;
}

.init(*args) ⇒ Object

MPI



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# File 'ext/mpipe/mpipe.c', line 40

static VALUE
mp_mpi_init(int argc, VALUE *argv, VALUE klass)
{
    char **cargv;
    VALUE progname, mpipe_ary;
    int i, size;

    cargv = ALLOCA_N(char *, argc+1);
    progname = rb_gv_get("$0");
    cargv[0] = StringValueCStr(progname);

    for(i=0; i<argc; i++) {
        if (TYPE(argv[i]) == T_STRING) {
            cargv[i+1] = StringValueCStr(argv[i]);
        } else {
            rb_raise(rb_eArgError, "argument must be string");
        }
    }
    argc++;

    MPI_Init(&argc, &cargv);

    if (mp_initialized) {
        return Qnil;
    } else {
        mp_initialized = 1;
    }
    atexit(mp_finalize);

    MPI_Comm_size(MPI_COMM_WORLD, &size);
    mpipe_ary = rb_ary_new2(size);
    rb_ivar_set(klass, id_allocated_mpipe, mpipe_ary);

    return Qnil;
}

.new(vrank) ⇒ Object

:nodoc:



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# File 'ext/mpipe/mpipe.c', line 240

static VALUE
mp_s_new(VALUE klass, VALUE vrank)
{
    VALUE mpipe, mpipe_ary;
    int rank;

    rank = NUM2INT(vrank);
    mpipe_ary = rb_ivar_get(klass, id_allocated_mpipe);
    mpipe = rb_ary_entry(mpipe_ary, rank);
    if (NIL_P(mpipe)) {
        mpipe = rb_class_new_instance(1, &vrank, klass);
        rb_ary_store(mpipe_ary, rank, mpipe);
    }
    return mpipe;
}

.select(*args) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 536

static VALUE
mp_s_select(int argc, VALUE *argv, VALUE mod)
{
    struct MPipe *ptr;
    MPI_Request *ary_of_requests;
    int *ary_of_indices;
    MPI_Status *ary_of_statuses;
    int incount, outcount;
    int i, count, istat;
    VALUE rd_ary, result_ary, item;

    if (argc==0) {
        rb_raise(rb_eArgError, "no argument");
    }
    incount = RARRAY_LEN(argv[0]);

    result_ary = rb_ary_new();
    rd_ary = rb_ary_new();
    rb_ary_push(result_ary, rd_ary);
    for (i=0; i < incount; i++) {
        item = RARRAY_AREF(argv[0], i);
        ptr = MPipe(item);
        if (ptr->recv_count > 0) {
            rb_ary_push(rd_ary, item);
        }
    }
    if (RARRAY_LEN(rd_ary) > 0) {
        return result_ary;
    }

    ary_of_requests = ALLOCA_N(MPI_Request, incount);
    ary_of_statuses = ALLOCA_N(MPI_Status, incount);
    ary_of_indices  = ALLOCA_N(int, incount);

    for (i=0; i < incount; i++) {
        item = RARRAY_AREF(argv[0], i);
        ptr = MPipe(item);
        call_irecv(ptr);
        ary_of_requests[i] = ptr->recv_request;
    }

    istat = MPI_Waitsome(incount, ary_of_requests,
                         &outcount, ary_of_indices, ary_of_statuses);
    if (istat != MPI_SUCCESS) {
        rb_raise(rb_eStandardError,"MPI_Waitany failed with status=%d",istat);
    }

    for (i=0; i < outcount; i++) {
        item = RARRAY_AREF(argv[0], ary_of_indices[i]);
        MPI_Get_count(&ary_of_statuses[i], MPI_BYTE, &count);
        ptr = MPipe(item);
        ptr->recv_count = count;
        rb_ary_push(rd_ary, item);
    }
    return result_ary;
}

Instance Method Details

#close ⇒ Object

#print(str) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 325

static VALUE
mp_write(VALUE self, VALUE str)
{
    struct MPipe *ptr = MPipe(self);
    int istat;
    int pos, count;

    str = StringValue(str);
    pos = 0;

    while (pos < RSTRING_LEN(str)) {
        count = RSTRING_LEN(str) - pos;
        if (count > mp_buffer_size) {
            count = mp_buffer_size;
        }
        memcpy(ptr->send_buffer, RSTRING_PTR(str)+pos, count);

        istat = MPI_Send(ptr->send_buffer, count, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_send failed with status=%d\n",istat);
        }

        pos += count;
    }
    return self;
}

#read(length[, outbuf]) ⇒ String?

Reads length bytes from the I/O stream.

length must be a non-negative integer.

Returns:

  • (String, nil) 


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# File 'ext/mpipe/mpipe.c', line 381

static VALUE
mp_read(int argc, VALUE *argv, VALUE self)
{
    struct MPipe *ptr = MPipe(self);
    MPI_Status status;
    int istat;
    int outbuf_pos = 0;
    int max_len;
    VALUE maxlen = Qnil;
    VALUE outbuf = Qnil;

    rb_scan_args(argc, argv, "11", &maxlen, &outbuf);

    max_len = NUM2INT(maxlen);
    if (max_len < 0) {
        rb_raise(rb_eArgError, "negative length %d given", max_len);
    }

    if (NIL_P(outbuf)) {
        outbuf = rb_str_new(0, 0);
    }
    rb_str_resize(outbuf, max_len);

    if (ptr->recv_count == -1) { // requesting
        istat = MPI_Wait(&ptr->recv_request, &status);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_Wait failed with status=%d",istat);
        }
        MPI_Get_count(&status, MPI_CHAR, &ptr->recv_count);
    }

    if (ptr->recv_count > 0) {
        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }

    while (outbuf_pos < max_len) {
        istat = MPI_Recv(ptr->recv_buffer, mp_buffer_size, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD, &status);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_recv failed with status=%d\n",istat);
        }
        MPI_Get_count(&status, MPI_CHAR, &ptr->recv_count);

        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }

    return outbuf;
}

#read_nonblock(maxlen[, outbuf [, opts]]) ⇒ String

Similar to #read, but raises EOFError at end of string unless the exception: false option is passed in.

Returns:

  • (String) 


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# File 'ext/mpipe/mpipe.c', line 478

static VALUE
mp_read_nonblock(int argc, VALUE *argv, VALUE self)
{
    struct MPipe *ptr = MPipe(self);
    int outbuf_pos = 0;
    int max_len;
    VALUE maxlen = Qnil;
    VALUE outbuf = Qnil;
    VALUE opts = Qnil;

    rb_scan_args(argc, argv, "11:", &maxlen, &outbuf, &opts);

    max_len = NUM2INT(maxlen);
    if (max_len < 0) {
        rb_raise(rb_eArgError, "negative length %d given", max_len);
    }

    if (NIL_P(outbuf)) {
        outbuf = rb_str_new(0, 0);
    }
    rb_str_resize(outbuf, max_len);

    if (maxlen == 0) {
        return outbuf;
    }

    if (ptr->recv_count == -1) { // requesting
        if (call_test(ptr) == 0) {
            if (!NIL_P(opts) && rb_hash_lookup2(opts, sym_exception, Qundef) == Qfalse) {
                return Qnil;
            } else {
                rb_raise(eEAGAINWaitReadable,"MPI_Irecv would block");
            }
        }
    }
    if (ptr->recv_count > 0) {
        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }

    while (outbuf_pos < max_len) {
        call_irecv(ptr);
        if (call_test(ptr) == 0) {
            if (outbuf_pos > 0) {
                rb_str_resize(outbuf, outbuf_pos);
                return outbuf;
            } else
            if (!NIL_P(opts) && rb_hash_lookup2(opts, sym_exception, Qundef) == Qfalse) {
                return Qnil;
            } else {
                rb_raise(eEAGAINWaitReadable,"MPI_Irecv would block");
            }
        }
        outbuf_pos += copy_substr(ptr, max_len, outbuf, outbuf_pos);
    }
    return outbuf;
}

#write(str) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 325

static VALUE
mp_write(VALUE self, VALUE str)
{
    struct MPipe *ptr = MPipe(self);
    int istat;
    int pos, count;

    str = StringValue(str);
    pos = 0;

    while (pos < RSTRING_LEN(str)) {
        count = RSTRING_LEN(str) - pos;
        if (count > mp_buffer_size) {
            count = mp_buffer_size;
        }
        memcpy(ptr->send_buffer, RSTRING_PTR(str)+pos, count);

        istat = MPI_Send(ptr->send_buffer, count, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_send failed with status=%d\n",istat);
        }

        pos += count;
    }
    return self;
}

#write_nonblock(str) ⇒ Object 



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# File 'ext/mpipe/mpipe.c', line 325

static VALUE
mp_write(VALUE self, VALUE str)
{
    struct MPipe *ptr = MPipe(self);
    int istat;
    int pos, count;

    str = StringValue(str);
    pos = 0;

    while (pos < RSTRING_LEN(str)) {
        count = RSTRING_LEN(str) - pos;
        if (count > mp_buffer_size) {
            count = mp_buffer_size;
        }
        memcpy(ptr->send_buffer, RSTRING_PTR(str)+pos, count);

        istat = MPI_Send(ptr->send_buffer, count, MPI_CHAR, ptr->rank,
                         0, MPI_COMM_WORLD);
        if (istat != MPI_SUCCESS) {
            rb_raise(rb_eStandardError,"MPI_send failed with status=%d\n",istat);
        }

        pos += count;
    }
    return self;
}